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World War II or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the
Allies An alliance is a relationship among people, groups, or states that have joined together for mutual benefit or to achieve some common purpose, whether or not an explicit agreement has been worked out among them. Members of an alliance are calle ...
and the
Axis powers The Axis powers, originally called the Rome–Berlin Axis and also Rome–Berlin–Tokyo Axis, was the military coalition which initiated World War II and fought against the Allies of World War II, Allies. Its principal members were Nazi Ge ...
. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of
total war Total war is a type of warfare that includes any and all (including civilian-associated) resources and infrastructure as legitimate military targets, mobilises all of the resources of society to fight the war, and gives priority to warfare ov ...
.
Tanks A tank is an armoured fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armour, and battlefield mobility provided by tracks and a powerful engine; t ...
and aircraft played major roles, enabling the
strategic bombing Strategic bombing is a systematically organized and executed military attack from the air which can utilize strategic bombers, long- or medium-range missiles, or nuclear-armed fighter-bomber aircraft to attack targets deemed vital to the enemy' ...
of cities and delivery of the first and only nuclear weapons ever used in war. World War II is the deadliest conflict in history, causing the death of 70 to 85 million people, more than half of whom were civilians. Millions died in
genocide Genocide is violence that targets individuals because of their membership of a group and aims at the destruction of a people. Raphael Lemkin, who first coined the term, defined genocide as "the destruction of a nation or of an ethnic group" by ...
s, including
the Holocaust The Holocaust (), known in Hebrew language, Hebrew as the (), was the genocide of History of the Jews in Europe, European Jews during World War II. From 1941 to 1945, Nazi Germany and Collaboration with Nazi Germany and Fascist Italy ...
, and by massacres, starvation, and disease. After the Allied victory,
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
,
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
,
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
, and
Korea Korea is a peninsular region in East Asia consisting of the Korean Peninsula, Jeju Island, and smaller islands. Since the end of World War II in 1945, it has been politically Division of Korea, divided at or near the 38th parallel north, 3 ...
were occupied, and German and Japanese leaders were tried for
war crime A war crime is a violation of the laws of war that gives rise to individual criminal responsibility for actions by combatants in action, such as intentionally killing civilians or intentionally killing prisoners of war, torture, taking hostage ...
s. The
causes of World War II The causes of World War II have been given considerable attention by historians. The immediate precipitating event was the invasion of Poland by Nazi Germany on September 1, 1939, and the subsequent declarations of war on Germany made by Unit ...
included unresolved tensions in the
aftermath of World War I The aftermath of World War I saw far-reaching and wide-ranging cultural, economic, and social change across Europe, Asia, Africa, and in areas outside those that were directly involved. Four empires collapsed due to the war, old countries were a ...
and the rise of
fascism in Europe Fascist movements in Europe were the set of various fascist ideologies which were practiced by governments and political organizations in Europe during the 20th century. Fascism was born in Italy following World War I, and other fascist move ...
and militarism in Japan. Key events preceding the war included Japan's invasion of Manchuria in 1931, the
Spanish Civil War The Spanish Civil War () was a military conflict fought from 1936 to 1939 between the Republican faction (Spanish Civil War), Republicans and the Nationalist faction (Spanish Civil War), Nationalists. Republicans were loyal to the Left-wing p ...
, the outbreak of the
Second Sino-Japanese War The Second Sino-Japanese War was fought between the Republic of China (1912–1949), Republic of China and the Empire of Japan between 1937 and 1945, following a period of war localized to Manchuria that started in 1931. It is considered part ...
in 1937, and Germany's annexations of Austria and the Sudetenland. World War II is generally considered to have begun on 1 September 1939, when
Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...
, under
Adolf Hitler Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the dictator of Nazi Germany from 1933 until Death of Adolf Hitler, his suicide in 1945. Adolf Hitler's rise to power, He rose to power as the lea ...
, invaded Poland, after which the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
and France declared war on Germany. Poland was divided between Germany and the
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
under the
Molotov–Ribbentrop Pact The Molotov–Ribbentrop Pact, officially the Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics, and also known as the Hitler–Stalin Pact and the Nazi–Soviet Pact, was a non-aggression pact between Nazi Ge ...
. In 1940, the Soviet Union annexed the Baltic states and parts of Finland and
Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...
. After the
fall of France The Battle of France (; 10 May – 25 June 1940), also known as the Western Campaign (), the French Campaign (, ) and the Fall of France, during the Second World War was the German invasion of the Low Countries (Belgium, Luxembourg and the Net ...
in June 1940, the war continued mainly between Germany and the
British Empire The British Empire comprised the dominions, Crown colony, colonies, protectorates, League of Nations mandate, mandates, and other Dependent territory, territories ruled or administered by the United Kingdom and its predecessor states. It bega ...
, with fighting in the Balkans, Mediterranean, and Middle East, the aerial
Battle of Britain The Battle of Britain () was a military campaign of the Second World War, in which the Royal Air Force (RAF) and the Fleet Air Arm (FAA) of the Royal Navy defended the United Kingdom (UK) against large-scale attacks by Nazi Germany's air force ...
and
the Blitz The Blitz (English: "flash") was a Nazi Germany, German bombing campaign against the United Kingdom, for eight months, from 7 September 1940 to 11 May 1941, during the Second World War. Towards the end of the Battle of Britain in 1940, a co ...
, and the naval
Battle of the Atlantic The Battle of the Atlantic, the longest continuous military campaign in World War II, ran from 1939 to the defeat of Nazi Germany in 1945, covering a major part of the naval history of World War II. At its core was the Allies of World War II, ...
. Through campaigns and treaties, Germany gained control of much of
continental Europe Continental Europe or mainland Europe is the contiguous mainland of Europe, excluding its surrounding islands. It can also be referred to ambiguously as the European continent, – which can conversely mean the whole of Europe – and, by som ...
and formed the Axis alliance with Italy,
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
, and other countries. In June 1941, Germany invaded the Soviet Union, opening the Eastern Front and initially making large territorial gains. In December 1941, Japan attacked American and British territories in Asia and the Pacific, including at Pearl Harbor in Hawaii, leading the United States to enter the war against Japan and Germany. Japan conquered much of coastal China and Southeast Asia, but its advances in the Pacific were halted in June 1942 at the
Battle of Midway The Battle of Midway was a major naval battle in the Pacific Ocean theater of World War II, Pacific Theater of World War II that took place on 4–7 June 1942, six months after Japan's attack on Pearl Harbor and one month after the Battle of t ...
. In early 1943, Axis forces were defeated in North Africa and at Stalingrad in the Soviet Union, and that year their continued defeats on the Eastern Front, an
Allied invasion of Italy The Allied invasion of Italy was the Allies of World War II, Allied Amphibious warfare, amphibious landing on mainland Italy that took place from 3 September 1943, during the Italian campaign (World War II), Italian campaign of World War II. T ...
, and Allied offensives in the Pacific forced them into retreat on all fronts. In 1944, the Western Allies invaded France at Normandy as the Soviet Union recaptured its pre-war territory and the US crippled Japan's navy and captured key Pacific islands. The war in Europe concluded with the liberation of German-occupied territories; invasions of Germany by the Western Allies and the Soviet Union, which culminated in the fall of Berlin to Soviet troops; and Germany's unconditional surrender on 8 May 1945. On 6 and 9 August, the US dropped atomic bombs on
Hiroshima is the capital of Hiroshima Prefecture in Japan. , the city had an estimated population of 1,199,391. The gross domestic product (GDP) in Greater Hiroshima, Hiroshima Urban Employment Area, was US$61.3 billion as of 2010. Kazumi Matsui has b ...
and
Nagasaki , officially , is the capital and the largest Cities of Japan, city of Nagasaki Prefecture on the island of Kyushu in Japan. Founded by the Portuguese, the port of Portuguese_Nagasaki, Nagasaki became the sole Nanban trade, port used for tr ...
in Japan. Faced with an imminent Allied invasion, the prospect of further atomic bombings, and a Soviet declaration of war and invasion of Manchuria, Japan announced its unconditional surrender on 15 August, and signed a surrender document on 2 September 1945. World War II transformed the political, economic, and social structures of the world, and established the foundation of international relations for the rest of the 20th century and into the 21st century. The
United Nations The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...
was created to foster international cooperation and prevent future conflicts, with the victorious great powers—China, France, the Soviet Union, the UK, and the US—becoming the permanent members of its security council. The Soviet Union and US emerged as rival global
superpower Superpower describes a sovereign state or supranational union that holds a dominant position characterized by the ability to Sphere of influence, exert influence and Power projection, project power on a global scale. This is done through the comb ...
s, setting the stage for the half-century
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
. In the wake of Europe's devastation, the influence of its great powers waned, triggering the
decolonisation of Africa The decolonisation of Africa was a series of political developments in Africa that spanned from the mid-1950s to 1975, during the Cold War. Colony, Colonial governments gave way to sovereign states in a process often marred by violence, politic ...
and
Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...
. Many countries whose industries had been damaged moved towards economic recovery and expansion.


Start and end dates

Most historians date the beginning of World War II to the
German invasion of Poland The invasion of Poland, also known as the September Campaign, Polish Campaign, and Polish Defensive War of 1939 (1 September – 6 October 1939), was a joint attack on the Second Polish Republic, Republic of Poland by Nazi Germany, the Slovak R ...
on 1 September 1939 and the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
and
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
's declaration of war on Germany two days later. Dates for the beginning of the
Pacific War The Pacific War, sometimes called the Asia–Pacific War or the Pacific Theatre, was the Theater (warfare), theatre of World War II fought between the Empire of Japan and the Allies of World War II, Allies in East Asia, East and Southeast As ...
include the start of the
Second Sino-Japanese War The Second Sino-Japanese War was fought between the Republic of China (1912–1949), Republic of China and the Empire of Japan between 1937 and 1945, following a period of war localized to Manchuria that started in 1931. It is considered part ...
on 7 July 1937, or the earlier
Japanese invasion of Manchuria The Empire of Japan's Kwantung Army invaded the Manchuria region of the Republic of China on 18 September 1931, immediately following the Mukden incident, a false flag event staged by Japanese military personnel as a pretext to invade. At the ...
, on 19 September 1931. Others follow the British historian A. J. P. Taylor, who stated that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously, and the two wars became World War II in 1941. Other proposed starting dates for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian
Antony Beevor Sir Antony James Beevor, (born 14 December 1946) is a British military historian. He has published several popular historical works, mainly on the Second World War, the Spanish Civil War, and most recently the Russian Revolution and Civil War. ...
views the beginning of World WarII as the
Battles of Khalkhin Gol The Battles of Khalkhin Gol (; ) were the decisive engagements of the undeclared Soviet–Japanese border conflicts involving the Soviet Union, Mongolian People's Republic, Mongolia, Empire of Japan, Japan and Manchukuo in 1939. The conflict wa ...
fought between
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
and the forces of
Mongolia Mongolia is a landlocked country in East Asia, bordered by Russia to the north and China to the south and southeast. It covers an area of , with a population of 3.5 million, making it the world's List of countries and dependencies by po ...
and the
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
from May to September 1939. Others view the
Spanish Civil War The Spanish Civil War () was a military conflict fought from 1936 to 1939 between the Republican faction (Spanish Civil War), Republicans and the Nationalist faction (Spanish Civil War), Nationalists. Republicans were loyal to the Left-wing p ...
as the start or prelude to World War II. The exact date of the war's end also is not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 15 August 1945 ( V-J Day), rather than with the formal
surrender of Japan The surrender of the Empire of Japan in World War II was Hirohito surrender broadcast, announced by Emperor Hirohito on 15 August and formally Japanese Instrument of Surrender, signed on 2 September 1945, End of World War II in Asia, ending ...
on 2 September 1945, which officially ended the war in Asia. A peace treaty between Japan and the Allies was signed in 1951. A 1990 treaty regarding Germany's future allowed the reunification of East and West Germany to take place. No formal peace treaty between Japan and the Soviet Union was ever signed, although the state of war between the two countries was terminated by the Soviet–Japanese Joint Declaration of 1956, which also restored full diplomatic relations between them.''Texts of Soviet–Japanese Statements; Peace Declaration Trade Protocol.''
The New York Times ''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of ...
, page 2, 20 October 1956.
Subtitle: "Moscow, October 19. (UP) – Following are the texts of a Soviet–Japanese peace declaration and of a trade protocol between the two countries, signed here today, in unofficial translation from the Russian". Quote: "The state of war between the USSR and Japan ends on the day the present declaration enters into force ..


Background


Aftermath of World War I

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
had radically altered the political European map with the defeat of the
Central Powers The Central Powers, also known as the Central Empires,; ; , ; were one of the two main coalitions that fought in World War I (1914–1918). It consisted of the German Empire, Austria-Hungary, the Ottoman Empire, and the Kingdom of Bulga ...
—including
Austria-Hungary Austria-Hungary, also referred to as the Austro-Hungarian Empire, the Dual Monarchy or the Habsburg Monarchy, was a multi-national constitutional monarchy in Central Europe#Before World War I, Central Europe between 1867 and 1918. A military ...
,
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
,
Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...
, and the
Ottoman Empire The Ottoman Empire (), also called the Turkish Empire, was an empire, imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Centr ...
—and the 1917 Bolshevik seizure of power in
Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
, which led to the founding of the Soviet Union. Meanwhile, the victorious
Allies of World War I The Allies or the Entente (, ) was an international military coalition of countries led by the French Republic, the United Kingdom, the Russian Empire, the United States, the Kingdom of Italy, and the Empire of Japan against the Central Powers ...
, such as France, Belgium, Italy, Romania, and Greece, gained territory, and new nation-states were created out of the dissolution of the Austro-Hungarian, Ottoman, and Russian Empires. To prevent a future world war, the
League of Nations The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
was established in 1920 by the Paris Peace Conference. The organisation's primary goals were to prevent armed conflict through collective security, military, and naval disarmament, as well as settling international disputes through peaceful negotiations and arbitration. Despite strong pacifist sentiment after World WarI,
irredentist Irredentism () is one state's desire to annex the territory of another state. This desire can be motivated by ethnic reasons because the population of the territory is ethnically similar to or the same as the population of the parent state. Hist ...
and revanchist
nationalism Nationalism is an idea or movement that holds that the nation should be congruent with the state. As a movement, it presupposes the existence and tends to promote the interests of a particular nation, Smith, Anthony. ''Nationalism: Theory, I ...
had emerged in several European states. These sentiments were especially marked in Germany because of the significant territorial, colonial, and financial losses imposed by the
Treaty of Versailles The Treaty of Versailles was a peace treaty signed on 28 June 1919. As the most important treaty of World War I, it ended the state of war between Germany and most of the Allies of World War I, Allied Powers. It was signed in the Palace ...
. Under the treaty, Germany lost around 13 percent of its home territory and all its overseas possessions, while German annexation of other states was prohibited, reparations were imposed, and limits were placed on the size and capability of the country's
armed forces A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. Militaries are typically authorized and maintained by a sovereign state, with their members identifiable by a ...
.


Germany and Italy

The German Empire was dissolved in the
German revolution of 1918–1919 German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...
, and a democratic government, later known as the
Weimar Republic The Weimar Republic, officially known as the German Reich, was the German Reich, German state from 1918 to 1933, during which it was a constitutional republic for the first time in history; hence it is also referred to, and unofficially proclai ...
, was created. The interwar period saw strife between supporters of the new republic and hardline opponents on both the political right and left. Italy, as an Entente ally, had made some post-war territorial gains; however, Italian nationalists were angered that the promises made by the United Kingdom and France to secure Italian entrance into the war were not fulfilled in the peace settlement. From 1922 to 1925, the
Fascist Fascism ( ) is a far-right, authoritarian, and ultranationalist political ideology and movement. It is characterized by a dictatorial leader, centralized autocracy, militarism, forcible suppression of opposition, belief in a natural soci ...
movement led by
Benito Mussolini Benito Amilcare Andrea Mussolini (29 July 188328 April 1945) was an Italian politician and journalist who, upon assuming office as Prime Minister of Italy, Prime Minister, became the dictator of Fascist Italy from the March on Rome in 1922 un ...
seized power in Italy with a nationalist,
totalitarian Totalitarianism is a political system and a form of government that prohibits opposition from political parties, disregards and outlaws the political claims of individual and group opposition to the state, and completely controls the public sph ...
, and class collaborationist agenda that abolished representative democracy, repressed socialist, left-wing, and liberal forces, and pursued an aggressive expansionist foreign policy aimed at making Italy a world power, promising the creation of a "New Roman Empire".
Adolf Hitler Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the dictator of Nazi Germany from 1933 until Death of Adolf Hitler, his suicide in 1945. Adolf Hitler's rise to power, He rose to power as the lea ...
, after an unsuccessful attempt to overthrow the German government in 1923, eventually became the chancellor of Germany in 1933 when President
Paul von Hindenburg Paul Ludwig Hans Anton von Beneckendorff und von Hindenburg (2 October 1847 – 2 August 1934) was a German military and political leader who led the Imperial German Army during the First World War and later became President of Germany (1919� ...
and the Reichstag appointed him. Following Hindenburg's death in 1934, Hitler proclaimed himself ''Führer'' of Germany and abolished democracy, espousing a radical, racially motivated revision of the world order, and soon began a massive rearmament campaign. France, seeking to secure its alliance with Italy, allowed Italy a free hand in Ethiopia, which Italy desired as a colonial possession. The situation was aggravated in early 1935 when the
Territory of the Saar Basin The Territory of the Saar Basin (, ; ) was a region occupied and governed by the United Kingdom and France from 1920 to 1935 under a League of Nations mandate. It had its own flag (adopted on 28 July 1920): a blue, white, and black horizontal t ...
was legally reunited with Germany, and Hitler repudiated the Treaty of Versailles, accelerated his rearmament programme, and introduced conscription.


European treaties

The United Kingdom, France and Italy formed the
Stresa Front The Stresa Front was an agreement made in Stresa, a town on the banks of Lake Maggiore in Italy, between French prime minister Pierre-Étienne Flandin (with Pierre Laval), British prime minister Ramsay MacDonald, and Italian prime minister Benit ...
in April 1935 in order to contain Germany, a key step towards military globalisation; however, that June, the United Kingdom made an independent naval agreement with Germany, easing prior restrictions. The Soviet Union, concerned by Germany's goals of capturing vast areas of Eastern Europe, drafted a treaty of mutual assistance with France. Before taking effect, though, the Franco-Soviet pact was required to go through the bureaucracy of the League of Nations, which rendered it essentially toothless. The United States, concerned with events in Europe and Asia, passed the Neutrality Act in August of the same year. Hitler defied the Versailles and
Locarno Treaties The Locarno Treaties, known collectively as the Locarno Pact, were seven post-World War I agreements negotiated amongst Germany, France, Great Britain, Belgium, Italy, Second Polish Republic, Poland and First Czechoslovak Republic, Czechoslovak ...
by remilitarising the Rhineland in March 1936, encountering little opposition due to the policy of
appeasement Appeasement, in an International relations, international context, is a diplomacy, diplomatic negotiation policy of making political, material, or territorial concessions to an aggressive power (international relations), power with intention t ...
. In October 1936, Germany and Italy formed the Rome–Berlin Axis. A month later, Germany and Japan signed the
Anti-Comintern Pact The Anti-Comintern Pact, officially the Agreement against the Communist International was an anti-communist pact concluded between Nazi Germany and the Empire of Japan on 25 November 1936 and was directed against the Communist International (Com ...
, which Italy joined the following year.


Asia

The
Kuomintang The Kuomintang (KMT) is a major political party in the Republic of China (Taiwan). It was the one party state, sole ruling party of the country Republic of China (1912-1949), during its rule from 1927 to 1949 in Mainland China until Retreat ...
party in China launched a unification campaign against regional warlords and nominally unified China in the mid-1920s, but was soon embroiled in a civil war against its former
Chinese Communist Party The Communist Party of China (CPC), also translated into English as Chinese Communist Party (CCP), is the founding and One-party state, sole ruling party of the People's Republic of China (PRC). Founded in 1921, the CCP emerged victorious in the ...
(CCP) allies and new regional warlords. In 1931, an increasingly militaristic
Empire of Japan The Empire of Japan, also known as the Japanese Empire or Imperial Japan, was the Japanese nation state that existed from the Meiji Restoration on January 3, 1868, until the Constitution of Japan took effect on May 3, 1947. From Japan–Kor ...
, which had long sought influence in China as the first step of what its government saw as the country's right to rule Asia, staged the Mukden incident as a pretext to invade Manchuria and establish the
puppet state A puppet state, puppet régime, puppet government or dummy government is a State (polity), state that is ''de jure'' independent but ''de facto'' completely dependent upon an outside Power (international relations), power and subject to its ord ...
of
Manchukuo Manchukuo, officially known as the State of Manchuria prior to 1934 and the Empire of Great Manchuria thereafter, was a puppet state of the Empire of Japan in Northeast China that existed from 1932 until its dissolution in 1945. It was ostens ...
. China appealed to the
League of Nations The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
to stop the Japanese invasion of Manchuria. Japan withdrew from the League of Nations after being condemned for its incursion into Manchuria. The two nations then fought several battles, in
Shanghai Shanghai, Shanghainese: , Standard Chinese pronunciation: is a direct-administered municipality and the most populous urban area in China. The city is located on the Chinese shoreline on the southern estuary of the Yangtze River, with the ...
, Rehe and
Hebei Hebei is a Provinces of China, province in North China. It is China's List of Chinese administrative divisions by population, sixth-most populous province, with a population of over 75 million people. Shijiazhuang is the capital city. It bor ...
, until the Tanggu Truce was signed in 1933. Thereafter, Chinese volunteer forces continued the resistance to Japanese aggression in
Manchuria Manchuria is a historical region in northeast Asia encompassing the entirety of present-day northeast China and parts of the modern-day Russian Far East south of the Uda (Khabarovsk Krai), Uda River and the Tukuringra-Dzhagdy Ranges. The exact ...
, and Chahar and Suiyuan. After the 1936
Xi'an Incident The Xi'an Incident was a Chinese political crisis that lasted from 12 to 26 December 1936. Chiang Kai-shek, the leader of the Nationalist government of China, was arrested in Xi'an by soldiers of the Northeastern Army under the command of Ge ...
, the Kuomintang and CCP forces agreed on a ceasefire to present a united front to oppose Japan.


Pre-war events


Italian invasion of Ethiopia (1935)

The
Second Italo-Ethiopian War The Second Italo-Ethiopian War, also referred to as the Second Italo-Abyssinian War, was a war of aggression waged by Fascist Italy, Italy against Ethiopian Empire, Ethiopia, which lasted from October 1935 to February 1937. In Ethiopia it is oft ...
was a brief colonial war that began in October 1935 and ended in May 1936. The war began with the invasion of the
Ethiopian Empire The Ethiopian Empire, historically known as Abyssinia or simply Ethiopia, was a sovereign state that encompassed the present-day territories of Ethiopia and Eritrea. It existed from the establishment of the Solomonic dynasty by Yekuno Amlak a ...
(also known as
Abyssinia Abyssinia (; also known as Abyssinie, Abissinia, Habessinien, or Al-Habash) was an ancient region in the Horn of Africa situated in the northern highlands of modern-day Ethiopia and Eritrea.Sven Rubenson, The survival of Ethiopian independence, ...
) by the armed forces of the
Kingdom of Italy The Kingdom of Italy (, ) was a unitary state that existed from 17 March 1861, when Victor Emmanuel II of Kingdom of Sardinia, Sardinia was proclamation of the Kingdom of Italy, proclaimed King of Italy, until 10 June 1946, when the monarchy wa ...
(), which was launched from
Italian Somaliland Italian Somaliland (; ; ) was a protectorate and later colony of the Kingdom of Italy in present-day Somalia, which was ruled in the 19th century by the Sultanate of Hobyo and the Majeerteen Sultanate in the north, and by the Hiraab Imamate and ...
and
Eritrea Eritrea, officially the State of Eritrea, is a country in the Horn of Africa region of East Africa, with its capital and largest city being Asmara. It is bordered by Ethiopia in the Eritrea–Ethiopia border, south, Sudan in the west, and Dj ...
. The war resulted in the
military occupation Military occupation, also called belligerent occupation or simply occupation, is temporary hostile control exerted by a ruling power's military apparatus over a sovereign territory that is outside of the legal boundaries of that ruling pow ...
of Ethiopia and its
annexation Annexation, in international law, is the forcible acquisition and assertion of legal title over one state's territory by another state, usually following military occupation of the territory. In current international law, it is generally held t ...
into the newly created colony of
Italian East Africa Italian East Africa (, A.O.I.) was a short-lived colonial possession of Fascist Italy from 1936 to 1941 in the Horn of Africa. It was established following the Second Italo-Ethiopian War, which led to the military occupation of the Ethiopian ...
(); in addition it exposed the weakness of the
League of Nations The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
as a force to preserve peace. Both Italy and Ethiopia were member nations, but the League did little when the former clearly violated Article X of the League's Covenant. The United Kingdom and France supported imposing sanctions on Italy for the invasion, but the sanctions were not fully enforced and failed to end the Italian invasion. Italy subsequently dropped its objections to Germany's goal of absorbing
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
.


Spanish Civil War (1936–1939)

When civil war broke out in Spain, Hitler and Mussolini lent military support to the Nationalist rebels, led by General
Francisco Franco Francisco Franco Bahamonde (born Francisco Paulino Hermenegildo Teódulo Franco Bahamonde; 4 December 1892 – 20 November 1975) was a Spanish general and dictator who led the Nationalist faction (Spanish Civil War), Nationalist forces i ...
. Italy supported the Nationalists to a greater extent than the Nazis: Mussolini sent more than 70,000 ground troops, 6,000 aviation personnel, and 720 aircraft to Spain. The Soviet Union supported the existing government of the Spanish Republic. More than 30,000 foreign volunteers, known as the
International Brigades The International Brigades () were soldiers recruited and organized by the Communist International to assist the Popular Front (Spain), Popular Front government of the Second Spanish Republic during the Spanish Civil War. The International Bri ...
, also fought against the Nationalists. Both Germany and the Soviet Union used this
proxy war In political science, a proxy war is an armed conflict where at least one of the belligerents is directed or supported by an external third-party power. In the term ''proxy war'', a belligerent with external support is the ''proxy''; both bel ...
as an opportunity to test in combat their most advanced weapons and tactics. The Nationalists won the civil war in April 1939; Franco, now dictator, remained officially neutral during World WarII but generally favoured the Axis. His greatest collaboration with Germany was the sending of
volunteers Volunteering is an elective and freely chosen act of an individual or group giving their time and labor, often for community service. Many volunteers are specifically trained in the areas they work, such as medicine, education, or emergenc ...
to fight on the Eastern Front.


Japanese invasion of China (1937)

In July 1937, Japan captured the former Chinese imperial capital of
Peking Beijing, previously romanized as Peking, is the capital city of China. With more than 22 million residents, it is the world's most populous national capital city as well as China's second largest city by urban area after Shanghai. It is l ...
after instigating the Marco Polo Bridge incident, which culminated in the Japanese campaign to invade all of China. The Soviets quickly signed a non-aggression pact with China to lend
materiel Materiel or matériel (; ) is supplies, equipment, and weapons in military supply-chain management, and typically supplies and equipment in a commerce, commercial supply chain management, supply chain context. Military In a military context, ...
support, effectively ending China's prior cooperation with Germany. From September to November, the Japanese attacked
Taiyuan Taiyuan; Mandarin pronunciation: (Jin Chinese, Taiyuan Jin: /tʰai˦˥ ye˩˩/) is the capital of Shanxi, China. Taiyuan is the political, economic, cultural and international exchange center of Shanxi Province. It is an industrial base foc ...
, engaged the Kuomintang Army around Xinkou,. and fought Communist forces in Pingxingguan.Yang Kuisong, "On the reconstruction of the facts of the Battle of Pingxingguan"
Generalissimo ''Generalissimo'' ( ), also generalissimus, is a military rank of the highest degree, superior to field marshal and other five-star ranks in the states where they are used. Usage The word (), an Italian term, is the absolute superlative ...
Chiang Kai-shek deployed his best army to defend Shanghai, but after three months of fighting, Shanghai fell. The Japanese continued to push Chinese forces back, capturing the capital Nanking in December 1937. After the fall of Nanking, tens or hundreds of thousands of Chinese civilians and disarmed combatants were murdered by the Japanese.Totten, Samuel. ''Dictionary of Genocide''. 2008, 298–299. In March 1938, Nationalist Chinese forces won their first major victory at Taierzhuang, but then the city of
Xuzhou Xuzhou ( zh, s=徐州), also known as Pengcheng () in ancient times, is a major city in northwestern Jiangsu province, China. The city, with a recorded population of 9,083,790 at the 2020 Chinese census, 2020 census (3,135,660 of which lived in ...
was taken by the Japanese in May. In June 1938, Chinese forces stalled the Japanese advance by flooding the Yellow River; this manoeuvre bought time for the Chinese to prepare their defences at
Wuhan Wuhan; is the capital of Hubei, China. With a population of over eleven million, it is the most populous city in Hubei and the List of cities in China by population, eighth-most-populous city in China. It is also one of the nine National cent ...
, but the city was taken by October. Japanese military victories did not bring about the collapse of Chinese resistance that Japan had hoped to achieve; instead, the Chinese government relocated inland to
Chongqing ChongqingPostal Romanization, Previously romanized as Chungking ();. is a direct-administered municipality in Southwestern China. Chongqing is one of the four direct-administered municipalities under the State Council of the People's Republi ...
and continued the war.


Soviet–Japanese border conflicts

In the mid-to-late 1930s, Japanese forces in
Manchukuo Manchukuo, officially known as the State of Manchuria prior to 1934 and the Empire of Great Manchuria thereafter, was a puppet state of the Empire of Japan in Northeast China that existed from 1932 until its dissolution in 1945. It was ostens ...
had sporadic border clashes with the Soviet Union and
Mongolia Mongolia is a landlocked country in East Asia, bordered by Russia to the north and China to the south and southeast. It covers an area of , with a population of 3.5 million, making it the world's List of countries and dependencies by po ...
. The Japanese doctrine of
Hokushin-ron was a political doctrine of the Empire of Japan before World War II that stated that Manchuria and Siberia were Japan's sphere of interest and that the potential value to Japan for economic and territorial expansionism, expansion in those areas ...
, which emphasised Japan's expansion northward, was favoured by the Imperial Army during this time. This policy would prove difficult to maintain in light of the Japanese defeat at Khalkin Gol in 1939, the ongoing Second Sino-Japanese War and ally Nazi Germany pursuing neutrality with the Soviets. Japan and the Soviet Union eventually signed a Neutrality Pact in April 1941, and Japan adopted the doctrine of
Nanshin-ron was a political doctrine in the Empire of Japan that stated that Southeast Asia and the Pacific Islands were Japan's sphere of interest and that their potential value to the Empire for economic and territorial expansion was greater than elsewh ...
, promoted by the Navy, which took its focus southward and eventually led to war with the United States and the Western Allies.


European occupations and agreements

In Europe, Germany and Italy were becoming more aggressive. In March 1938, Germany annexed Austria, again provoking little response from other European powers. Encouraged, Hitler began pressing German claims on the
Sudetenland The Sudetenland ( , ; Czech and ) is a German name for the northern, southern, and western areas of former Czechoslovakia which were inhabited primarily by Sudeten Germans. These German speakers had predominated in the border districts of Bohe ...
, an area of
Czechoslovakia Czechoslovakia ( ; Czech language, Czech and , ''Česko-Slovensko'') was a landlocked country in Central Europe, created in 1918, when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland beca ...
with a predominantly
ethnic German Germans (, ) are the natives or inhabitants of Germany, or sometimes more broadly any people who are of German descent or native speakers of the German language. The constitution of Germany, implemented in 1949 following the end of World War ...
population. Soon the United Kingdom and France followed the appeasement policy of British Prime Minister
Neville Chamberlain Arthur Neville Chamberlain (; 18 March 18699 November 1940) was a British politician who served as Prime Minister of the United Kingdom from May 1937 to May 1940 and Leader of the Conservative Party (UK), Leader of the Conservative Party from ...
and conceded this territory to Germany in the
Munich Agreement The Munich Agreement was reached in Munich on 30 September 1938, by Nazi Germany, the United Kingdom, the French Third Republic, French Republic, and the Kingdom of Italy. The agreement provided for the Occupation of Czechoslovakia (1938–194 ...
, which was made against the wishes of the Czechoslovak government, in exchange for a promise of no further territorial demands. Soon afterwards, Germany and Italy forced Czechoslovakia to cede additional territory to Hungary, and Poland annexed the
Trans-Olza Trans-Olza (, ; , ''Záolší''; ), also known as Trans-Olza Silesia (), is a territory in the Czech Republic which was disputed between Poland and Czechoslovakia during the Interwar Period. Its name comes from the Olza River. The history of ...
region of Czechoslovakia. Although all of Germany's stated demands had been satisfied by the agreement, privately Hitler was furious that British interference had prevented him from seizing all of Czechoslovakia in one operation. In subsequent speeches Hitler attacked British and Jewish "war-mongers" and in January 1939 secretly ordered a major build-up of the German navy to challenge British naval supremacy. In March 1939, Germany invaded the remainder of Czechoslovakia and subsequently split it into the German
Protectorate of Bohemia and Moravia The Protectorate of Bohemia and Moravia was a partially-annexation, annexed territory of Nazi Germany that was established on 16 March 1939 after the Occupation of Czechoslovakia (1938–1945), German occupation of the Czech lands. The protector ...
and a pro-German
client state A client state in the context of international relations is a State (polity), state that is economically, politically, and militarily subordinated to a more powerful controlling state. Alternative terms for a ''client state'' are satellite state, ...
, the
Slovak Republic Slovakia, officially the Slovak Republic, is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the west, and the Czech Republic to the northwest. Slovakia's ...
. Hitler also delivered an ultimatum to Lithuania on 20 March 1939, forcing the concession of the
Klaipėda Region The Klaipėda Region () or Memel Territory ( or ''Memelgebiet'') was defined by the 1919 Treaty of Versailles in 1920 and refers to the northernmost part of the German province of East Prussia, when, as Memelland, it was put under the administr ...
, formerly the German ''Memelland''. Greatly alarmed and with Hitler making further demands on the
Free City of Danzig The Free City of Danzig (; ) was a city-state under the protection and oversight of the League of Nations between 1920 and 1939, consisting of the Baltic Sea port of Danzig (now Gdańsk, Poland) and nearly 200 other small localities in the surrou ...
, the United Kingdom and France guaranteed their support for Polish independence; when Italy conquered Albania in April 1939, the same guarantee was extended to the Kingdoms of Romania and
Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
. Shortly after the Franco-
British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies. * British national identity, the characteristics of British people and culture ...
pledge to Poland, Germany and Italy formalised their own alliance with the
Pact of Steel The Pact of Steel (, ), formally known as the Pact of Friendship and Alliance between Germany and Italy (, ), was a military and political alliance between Germany and Italy, signed in 1939. The pact was initially drafted as a tripartite milita ...
. Hitler accused the United Kingdom and Poland of trying to "encircle" Germany and renounced the
Anglo-German Naval Agreement The Anglo-German Naval Agreement (AGNA) of 18 June 1935 was a naval agreement between the United Kingdom and Germany regulating the size of the ''Kriegsmarine'' in relation to the Royal Navy. The Anglo-German Naval Agreement fixed a ratio where ...
and the German–Polish declaration of non-aggression. The situation became a crisis in late August as German troops continued to mobilise against the Polish border. On 23 August the Soviet Union signed a non-aggression pact with Germany, after tripartite negotiations for a military alliance between France, the United Kingdom, and Soviet Union had stalled. This pact had a secret protocol that defined German and Soviet "spheres of influence" (western
Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...
and Lithuania for Germany; eastern Poland, Finland,
Estonia Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...
,
Latvia Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to t ...
and
Bessarabia Bessarabia () is a historical region in Eastern Europe, bounded by the Dniester river on the east and the Prut river on the west. About two thirds of Bessarabia lies within modern-day Moldova, with the Budjak region covering the southern coa ...
for the Soviet Union), and raised the question of continuing Polish independence. The pact neutralised the possibility of Soviet opposition to a campaign against Poland and assured that Germany would not have to face the prospect of a two-front war, as it had in World WarI. Immediately afterwards, Hitler ordered the attack to proceed on 26 August, but upon hearing that the United Kingdom had concluded a formal mutual assistance pact with Poland and that Italy would maintain neutrality, he decided to delay it. In response to British requests for direct negotiations to avoid war, Germany made demands on Poland, which served as a pretext to worsen relations. On 29 August, Hitler demanded that a Polish
plenipotentiary A ''plenipotentiary'' (from the Latin ''plenus'' "full" and ''potens'' "powerful") is a diplomat who has full powers—authorization to sign a treaty or convention on behalf of a sovereign. When used as a noun more generally, the word can als ...
immediately travel to Berlin to negotiate the handover of Danzig, and to allow a
plebiscite A referendum, plebiscite, or ballot measure is a direct vote by the electorate (rather than their representatives) on a proposal, law, or political issue. A referendum may be either binding (resulting in the adoption of a new policy) or adv ...
in the Polish Corridor in which the German minority would vote on secession. The Poles refused to comply with the German demands, and on the night of 30–31 August in a confrontational meeting with the British ambassador
Nevile Henderson Sir Nevile Meyrick Henderson (10 June 1882 – 30 December 1942) was a British diplomat who served as the ambassador of the United Kingdom to Nazi Germany, Germany from 1937 to 1939. Early life and education Henderson was born at Sedgwick, Wes ...
, Ribbentrop declared that Germany considered its claims rejected.


Course of the war


War breaks out in Europe (1939–1940)

On 1 September 1939, Germany invaded Poland after having staged several false flag border incidents as a pretext to initiate the invasion. The first German attack of the war came against the Polish defences at Westerplatte. The United Kingdom responded with an ultimatum for Germany to cease military operations, and on 3 September, after the ultimatum was ignored, Britain and France declared war on Germany. During the
Phoney War The Phoney War (; ; ) was an eight-month period at the outset of World War II during which there were virtually no Allied military land operations on the Western Front from roughly September 1939 to May 1940. World War II began on 3 Septembe ...
period, the alliance provided no direct military support to Poland, outside of a cautious French probe into the Saarland..
, observes that, while it is true that Poland was far away, making it difficult for the French and British to provide support, " w Western historians of World War II ... know that the British had committed to bomb Germany if it attacked Poland, but did not do so except for one raid on the base of Wilhelmshaven. The French, who committed to attacking Germany in the west, had no intention of doing so."
The Western Allies also began a naval blockade of Germany, which aimed to damage the country's economy and war effort. Germany responded by ordering U-boat warfare against Allied merchant and warships, which would later escalate into the
Battle of the Atlantic The Battle of the Atlantic, the longest continuous military campaign in World War II, ran from 1939 to the defeat of Nazi Germany in 1945, covering a major part of the naval history of World War II. At its core was the Allies of World War II, ...
. On 8 September, German troops reached the suburbs of
Warsaw Warsaw, officially the Capital City of Warsaw, is the capital and List of cities and towns in Poland, largest city of Poland. The metropolis stands on the Vistula, River Vistula in east-central Poland. Its population is officially estimated at ...
. The Polish counter-offensive to the west halted the German advance for several days, but it was outflanked and encircled by the ''
Wehrmacht The ''Wehrmacht'' (, ) were the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the German Army (1935–1945), ''Heer'' (army), the ''Kriegsmarine'' (navy) and the ''Luftwaffe'' (air force). The designation "''Wehrmac ...
''. Remnants of the Polish army broke through to besieged Warsaw. On 17 September 1939, two days after signing a cease-fire with Japan, the Soviet Union invaded Poland under the supposed pretext that the Polish state had ceased to exist. On 27 September, the Warsaw garrison surrendered to the Germans, and the last large operational unit of the Polish Army surrendered on 6October. Despite the military defeat, Poland never surrendered; instead, it formed the
Polish government-in-exile The Polish government-in-exile, officially known as the Government of the Republic of Poland in exile (), was the government in exile of Poland formed in the aftermath of the Invasion of Poland of September 1939, and the subsequent Occupation ...
and a clandestine state apparatus remained in occupied Poland. A significant part of Polish military personnel evacuated to Romania and Latvia; many of them later fought against the Axis in other theatres of the war. Germany annexed western Poland and occupied central Poland; the Soviet Union annexed eastern Poland; small shares of Polish territory were transferred to
Lithuania Lithuania, officially the Republic of Lithuania, is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea, bordered by Latvia to the north, Belarus to the east and south, P ...
and
Slovakia Slovakia, officially the Slovak Republic, is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the west, and the Czech Republic to the northwest. Slovakia's m ...
. On 6 October, Hitler made a public peace overture to the United Kingdom and France but said that the future of Poland was to be determined exclusively by Germany and the Soviet Union. The proposal was rejected and Hitler ordered an immediate offensive against France, which was postponed until the spring of 1940 due to bad weather. After the outbreak of war in Poland, Stalin threatened
Estonia Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...
,
Latvia Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to t ...
, and
Lithuania Lithuania, officially the Republic of Lithuania, is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea, bordered by Latvia to the north, Belarus to the east and south, P ...
with military invasion, forcing the three
Baltic countries The Baltic states or the Baltic countries is a geopolitical term encompassing Estonia, Latvia, and Lithuania. All three countries are members of NATO, the European Union, the Eurozone, and the OECD. The three sovereign states on the eastern co ...
to sign pacts allowing the creation of Soviet military bases in these countries; in October 1939, significant Soviet military contingents were moved there.
Finland Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, ...
refused to sign a similar pact and rejected ceding part of its territory to the Soviet Union. The Soviet Union invaded Finland in November 1939, and was subsequently expelled from the
League of Nations The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
for this crime of aggression. Despite overwhelming numerical superiority, Soviet military success during the
Winter War The Winter War was a war between the Soviet Union and Finland. It began with a Soviet invasion of Finland on 30 November 1939, three months after the outbreak of World War II, and ended three and a half months later with the Moscow Peac ...
was modest, and the Finno-Soviet war ended in March 1940 with some Finnish concessions of territory. In June 1940, the Soviet Union occupied the entire territories of Estonia, Latvia and Lithuania, as well as the Romanian regions of Bessarabia, Northern Bukovina, and the Hertsa region. In August 1940, Hitler imposed the
Second Vienna Award The Second Vienna Award was the second of two territorial disputes that were arbitrated by Nazi Germany and the Kingdom of Italy. On 30 August 1940, they assigned the territory of Northern Transylvania, including all of Maramureș and part of Cri ...
on Romania which led to the transfer of
Northern Transylvania Northern Transylvania (, ) was the region of the Kingdom of Romania that during World War II, as a consequence of the August 1940 territorial agreement known as the Second Vienna Award, became part of the Kingdom of Hungary (1920-1946), Kingdom ...
to Hungary. In September 1940, Bulgaria demanded
Southern Dobruja Southern Dobruja or South Dobruja ( or simply , ; or , ), also the Quadrilateral (), is an area of north-eastern Bulgaria comprising Dobrich and Silistra provinces, part of the historical region of Dobruja. It has an area of 7,412 square km an ...
from Romania with German and Italian support, leading to the
Treaty of Craiova The Treaty of Craiova (; ) was signed on 7 September 1940 and ratified on 13 September 1940 by the Kingdom of Bulgaria and the Kingdom of Romania. Under its terms, Romania had to allow Bulgaria to retake Southern Dobruja, which Romania had gained ...
. The loss of one-third of Romania's 1939 territory caused a coup against King Carol II, turning Romania into a fascist dictatorship under Marshal
Ion Antonescu Ion Antonescu (; ; – 1 June 1946) was a Romanian military officer and Mareșal (Romania), marshal who presided over two successive Romania during World War II, wartime dictatorships as Prime Minister of Romania, Prime Minister and ''Conduc� ...
, with a course set towards the Axis in the hopes of a German guarantee. Meanwhile, German-Soviet political relations and economic co-operation gradually stalled, and both states began preparations for war.


Western Europe (1940–1941)

In April 1940, Germany invaded Denmark and Norway to protect shipments of iron ore from Sweden, which the Allies were attempting to cut off. Denmark capitulated after six hours, and despite Allied support, Norway was conquered within two months. British discontent over the Norwegian campaign led to the resignation of Prime Minister
Neville Chamberlain Arthur Neville Chamberlain (; 18 March 18699 November 1940) was a British politician who served as Prime Minister of the United Kingdom from May 1937 to May 1940 and Leader of the Conservative Party (UK), Leader of the Conservative Party from ...
, who was replaced by
Winston Churchill Sir Winston Leonard Spencer Churchill (30 November 1874 – 24 January 1965) was a British statesman, military officer, and writer who was Prime Minister of the United Kingdom from 1940 to 1945 (Winston Churchill in the Second World War, ...
on 10May 1940. On the same day, Germany launched an offensive against France. To circumvent the strong
Maginot Line The Maginot Line (; ), named after the Minister of War (France), French Minister of War André Maginot, is a line of concrete fortifications, obstacles and weapon installations built by French Third Republic, France in the 1930s to deter invas ...
fortifications on the Franco-German border, Germany directed its attack at the neutral nations of
Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...
,
the Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...
, and
Luxembourg Luxembourg, officially the Grand Duchy of Luxembourg, is a landlocked country in Western Europe. It is bordered by Belgium to the west and north, Germany to the east, and France on the south. Its capital and most populous city, Luxembour ...
. The Germans carried out a flanking manoeuvre through the
Ardennes The Ardennes ( ; ; ; ; ), also known as the Ardennes Forest or Forest of Ardennes, is a region of extensive forests, rough terrain, rolling hills and ridges primarily in Belgium and Luxembourg, extending into Germany and France. Geological ...
region, which was mistakenly perceived by the Allies as an impenetrable natural barrier against armoured vehicles. By successfully implementing new ''
Blitzkrieg ''Blitzkrieg'(Lightning/Flash Warfare)'' is a word used to describe a combined arms surprise attack, using a rapid, overwhelming force concentration that may consist of armored and motorized or mechanized infantry formations, together with ...
'' tactics, the ''Wehrmacht'' rapidly advanced to the Channel and cut off the Allied forces in Belgium, trapping the bulk of the Allied armies in a cauldron on the Franco-Belgian border near Lille. The United Kingdom was able to evacuate a significant number of Allied troops from the continent by early June, although they had to abandon almost all their equipment. On 10 June, Italy invaded France, declaring war on both France and the United Kingdom. The Germans turned south against the weakened French army, and
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
fell to them on 14June. Eight days later France signed an armistice with Germany; it was divided into
German German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also Ge ...
and Italian occupation zones, and an unoccupied
rump state A rump state is the remnant of a once much larger state that was reduced in the wake of secession, annexation, occupation, decolonization, a successful coup d'état or revolution on part of its former territory. In the last case, a government st ...
under the
Vichy Regime Vichy France (; 10 July 1940 – 9 August 1944), officially the French State ('), was a French rump state headed by Marshal Philippe Pétain during World War II, established as a result of the French capitulation after the defeat against ...
, which, though officially neutral, was generally aligned with Germany. France kept its fleet, which the United Kingdom attacked on 3July in an attempt to prevent its seizure by Germany. The air
Battle of Britain The Battle of Britain () was a military campaign of the Second World War, in which the Royal Air Force (RAF) and the Fleet Air Arm (FAA) of the Royal Navy defended the United Kingdom (UK) against large-scale attacks by Nazi Germany's air force ...
began in early July with Luftwaffe attacks on shipping and harbours. The German campaign for air superiority started in August but its failure to defeat
RAF Fighter Command RAF Fighter Command was one of the commands of the Royal Air Force. It was formed in 1936 to allow more specialised control of fighter aircraft. It operated throughout the Second World War, winning fame during the Battle of Britain in 1940. The ...
forced the indefinite postponement of the proposed German invasion of Britain. The German
strategic bombing Strategic bombing is a systematically organized and executed military attack from the air which can utilize strategic bombers, long- or medium-range missiles, or nuclear-armed fighter-bomber aircraft to attack targets deemed vital to the enemy' ...
offensive intensified with night attacks on London and other cities in
the Blitz The Blitz (English: "flash") was a Nazi Germany, German bombing campaign against the United Kingdom, for eight months, from 7 September 1940 to 11 May 1941, during the Second World War. Towards the end of the Battle of Britain in 1940, a co ...
, but largely ended in May 1941 after failing to significantly disrupt the British war effort. Using newly captured French ports, the German Navy enjoyed success against an over-extended
Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
, using
U-boat U-boats are Submarine#Military, naval submarines operated by Germany, including during the World War I, First and Second World Wars. The term is an Anglicization#Loanwords, anglicized form of the German word , a shortening of (), though the G ...
s against British shipping in the Atlantic. The British
Home Fleet The Home Fleet was a fleet of the Royal Navy that operated from the United Kingdom's territorial waters from 1902 with intervals until 1967. In 1967, it was merged with the Mediterranean Fleet creating the new Western Fleet. Before the First ...
scored a significant victory on 27May 1941 by sinking the German battleship ''Bismarck''. In November 1939, the United States was assisting China and the Western Allies, and had amended the Neutrality Act to allow " cash and carry" purchases by the Allies. In 1940, following the German capture of Paris, the size of the
United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
was significantly increased. In September the United States further agreed to a trade of American destroyers for British bases. Still, a large majority of the American public continued to oppose any direct military intervention in the conflict well into 1941. In December 1940, Roosevelt accused Hitler of planning world conquest and ruled out any negotiations as useless, calling for the United States to become an "
arsenal of democracy "Arsenal of Democracy" was the central phrase used by U.S. President Franklin D. Roosevelt in a Fireside chats, radio broadcast on the threat to national security, delivered on December 29, 1940—nearly a year before the United States entered t ...
" and promoting
Lend-Lease Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States (),3,000 Hurricanes and >4,000 other aircraft) * 28 naval vessels: ** 1 Battleship. (HMS Royal Sovereign (05), HMS Royal Sovereign) * ...
programmes of military and humanitarian aid to support the British war effort; Lend-Lease was later extended to the other Allies, including the Soviet Union after it was invaded by Germany. The United States started strategic planning to prepare for a full-scale offensive against Germany. At the end of September 1940, the
Tripartite Pact The Tripartite Pact, also known as the Berlin Pact, was an agreement between Germany, Italy, and Japan signed in Berlin on 27 September 1940 by, respectively, Joachim von Ribbentrop, Galeazzo Ciano, and Saburō Kurusu (in that order) and in the ...
formally united Japan, Italy, and Germany as the
Axis powers The Axis powers, originally called the Rome–Berlin Axis and also Rome–Berlin–Tokyo Axis, was the military coalition which initiated World War II and fought against the Allies of World War II, Allies. Its principal members were Nazi Ge ...
. The Tripartite Pact stipulated that any country—with the exception of the Soviet Union—that attacked any Axis Power would be forced to go to war against all three. The Axis expanded in November 1940 when
Hungary Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
,
Slovakia Slovakia, officially the Slovak Republic, is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the west, and the Czech Republic to the northwest. Slovakia's m ...
, and
Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...
joined.
Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...
and
Hungary Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
later made major contributions to the Axis war against the Soviet Union, in Romania's case partially to recapture territory ceded to the Soviet Union.


Mediterranean (1940–1941)

In early June 1940, the Italian '' Regia Aeronautica'' attacked and besieged Malta, a British possession. From late summer to early autumn, Italy conquered British Somaliland and made an incursion into British-held Egypt. In October, Italy attacked Greece, but the attack was repulsed with heavy Italian casualties; the campaign ended within months with minor territorial changes. To assist Italy and prevent Britain from gaining a foothold, Germany prepared to invade the Balkans, which would threaten Romanian oil fields and strike against British dominance of the Mediterranean. In December 1940, British Empire forces began counter-offensives against Italian forces in Egypt and
Italian East Africa Italian East Africa (, A.O.I.) was a short-lived colonial possession of Fascist Italy from 1936 to 1941 in the Horn of Africa. It was established following the Second Italo-Ethiopian War, which led to the military occupation of the Ethiopian ...
. The offensives were successful; by early February 1941, Italy had lost control of eastern Libya, and large numbers of Italian troops had been taken prisoner. The
Italian Navy The Italian Navy (; abbreviated as MM) is one of the four branches of Italian Armed Forces and was formed in 1946 from what remained of the ''Regia Marina'' (Royal Navy) after World War II. , the Italian Navy had a strength of 30,923 active per ...
also suffered significant defeats, with the Royal Navy putting three Italian battleships out of commission after a carrier attack at Taranto, and neutralising several more warships at the
Battle of Cape Matapan The Battle of Cape Matapan () was a naval battle during the Second World War between the Allies, represented by the navies of the United Kingdom and Australia, and the Royal Italian Navy, from 27 to 29 March 1941. Cape Matapan is on the so ...
. Italian defeats prompted Germany to deploy an expeditionary force to North Africa; at the end of March 1941, Rommel's
Afrika Korps The German Africa Corps (, ; DAK), commonly known as Afrika Korps, was the German expeditionary force in Africa during the North African campaign of World War II. First sent as a holding force to shore up the Italian defense of its Africa ...
launched an offensive which drove back Commonwealth forces. In less than a month, Axis forces advanced to western Egypt and besieged the port of Tobruk. By late March 1941,
Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...
and
Yugoslavia , common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p ...
signed the
Tripartite Pact The Tripartite Pact, also known as the Berlin Pact, was an agreement between Germany, Italy, and Japan signed in Berlin on 27 September 1940 by, respectively, Joachim von Ribbentrop, Galeazzo Ciano, and Saburō Kurusu (in that order) and in the ...
; however, the Yugoslav government was overthrown two days later by pro-British nationalists. Germany and Italy responded with simultaneous invasions of both
Yugoslavia , common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p ...
and
Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
, commencing on 6 April 1941; both nations were forced to surrender within the month. The airborne invasion of the Greek island of Crete at the end of May completed the German conquest of the Balkans. Partisan warfare subsequently broke out against the Axis occupation of Yugoslavia, which continued until the end of the war. In the Middle East in May, Commonwealth forces quashed an uprising in Iraq which had been supported by German aircraft from bases within Vichy-controlled
Syria Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...
. Between June and July, British-led forces invaded and occupied the French possessions of Syria and Lebanon, assisted by the
Free French Free France () was a resistance government claiming to be the legitimate government of France following the dissolution of the Third French Republic, Third Republic during World War II. Led by General , Free France was established as a gover ...
.


Axis attack on the Soviet Union (1941)

With the situation in Europe and Asia relatively stable, Germany, Japan, and the Soviet Union made preparations for war. With the Soviets wary of mounting tensions with Germany, and the Japanese planning to take advantage of the European War by seizing resource-rich European possessions in
Southeast Asia Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...
, the two powers signed the
Soviet–Japanese Neutrality Pact The , also known as the , was a non-aggression pact between the Soviet Union and the Empire of Japan signed on April 13, 1941, two years after the conclusion of the Soviet-Japanese Border War. The agreement meant that for most of World War II, ...
in April 1941. By contrast, the Germans were steadily making preparations for an attack on the Soviet Union, massing forces on the Soviet border. Hitler believed that the United Kingdom's refusal to end the war was based on the hope that the United States and the Soviet Union would enter the war against Germany sooner or later. On 31 July 1940, Hitler decided that the Soviet Union should be eliminated and aimed for the conquest of
Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...
, the
Baltic states The Baltic states or the Baltic countries is a geopolitical term encompassing Estonia, Latvia, and Lithuania. All three countries are members of NATO, the European Union, the Eurozone, and the OECD. The three sovereign states on the eastern co ...
and Byelorussia.. However, other senior German officials like Ribbentrop saw an opportunity to create a Euro-Asian bloc against the British Empire by inviting the Soviet Union into the Tripartite Pact.. In November 1940, negotiations took place to determine if the Soviet Union would join the pact. The Soviets showed some interest but asked for concessions from Finland, Bulgaria, Turkey, and Japan that Germany considered unacceptable. On 18 December 1940, Hitler issued the directive to prepare for an invasion of the Soviet Union. On 22 June 1941, Germany, supported by Italy and Romania, invaded the Soviet Union in
Operation Barbarossa Operation Barbarossa was the invasion of the Soviet Union by Nazi Germany and several of its European Axis allies starting on Sunday, 22 June 1941, during World War II. More than 3.8 million Axis troops invaded the western Soviet Union along ...
, with Germany accusing the Soviets of plotting against them; they were joined shortly by Finland and Hungary. The primary targets of this surprise offensive were the
Baltic region The Baltic Sea Region, alternatively the Baltic Rim countries (or simply the Baltic Rim), and the Baltic Sea countries/states, refers to the general area surrounding the Baltic Sea, including parts of Northern, Central and Eastern Europe. Un ...
, Moscow and Ukraine, with the ultimate goal of ending the 1941 campaign near the Arkhangelsk-Astrakhan line—from the Caspian to the
White Sea The White Sea (; Karelian language, Karelian and ; ) is a southern inlet of the Barents Sea located on the northwest coast of Russia. It is surrounded by Karelia to the west, the Kola Peninsula to the north, and the Kanin Peninsula to the nort ...
s. Hitler's objectives were to eliminate the Soviet Union as a military power, exterminate
Communism Communism () is a political sociology, sociopolitical, political philosophy, philosophical, and economic ideology, economic ideology within the history of socialism, socialist movement, whose goal is the creation of a communist society, a ...
, generate ''
Lebensraum (, ) is a German concept of expansionism and Völkisch movement, ''Völkisch'' nationalism, the philosophy and policies of which were common to German politics from the 1890s to the 1940s. First popularized around 1901, '' lso in:' beca ...
'' ("living space") by dispossessing the native population, and guarantee access to the strategic resources needed to defeat Germany's remaining rivals. Although the
Red Army The Workers' and Peasants' Red Army, often shortened to the Red Army, was the army and air force of the Russian Soviet Republic and, from 1922, the Soviet Union. The army was established in January 1918 by a decree of the Council of People ...
was preparing for strategic counter-offensives before the war, ''Operation'' ''Barbarossa'' forced the Soviet supreme command to adopt strategic defence. During the summer, the Axis made significant gains into Soviet territory, inflicting immense losses in both personnel and materiel. By mid-August, however, the German Army High Command decided to suspend the offensive of a considerably depleted
Army Group Centre Army Group Centre () was the name of two distinct strategic German Army Groups that fought on the Eastern Front in World War II. The first Army Group Centre was created during the planning of Operation Barbarossa, Germany's invasion of the So ...
, and to divert the
2nd Panzer Group The 2nd Panzer Army () was a German armoured formation during World War II, formed from the 2nd Panzer Group on October 5, 1941. Organisation Panzer Group Guderian () was formed on 5 June 1940 and named after its commander, general Heinz Gude ...
to reinforce troops advancing towards central Ukraine and Leningrad. The Kiev offensive was overwhelmingly successful, resulting in encirclement and elimination of four Soviet armies, and made possible further advance into Crimea and industrially-developed Eastern Ukraine (the
First Battle of Kharkov The First Battle of Kharkov was a battle that took place from 20 to 24 October 1941 for control of the city of Kharkov, located in the Ukrainian SSR, during the final stage of Operation Barbarossa. The battle was fought between the German 6t ...
). The diversion of three-quarters of the Axis troops and the majority of their air forces from France and the central Mediterranean to the Eastern Front prompted the United Kingdom to reconsider its grand strategy. In July, the UK and the Soviet Union formed a military alliance against Germany and in August, the United Kingdom and the United States jointly issued the
Atlantic Charter The Atlantic Charter was a statement issued on 14 August 1941 that set out American and British goals for the world after the end of World War II, months before the US officially entered the war. The joint statement, later dubbed the Atlantic C ...
, which outlined British and American goals for the post-war world. In late August the British and Soviets invaded neutral Iran to secure the Persian Corridor, Iran's
oil fields A petroleum reservoir or oil and gas reservoir is a subsurface accumulation of hydrocarbons contained in porous or fractured rock formations. Such reservoirs form when kerogen (ancient plant matter) is created in surrounding rock by the presen ...
, and preempt any Axis advances through Iran toward the Baku oil fields or India. By October, Axis powers had achieved operational objectives in Ukraine and the Baltic region, with only the sieges of
Leningrad Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...
and
Sevastopol Sevastopol ( ), sometimes written Sebastopol, is the largest city in Crimea and a major port on the Black Sea. Due to its strategic location and the navigability of the city's harbours, Sevastopol has been an important port and naval base th ...
continuing. A major offensive against Moscow was renewed; after two months of fierce battles in increasingly harsh weather, the German army almost reached the outer suburbs of Moscow, where the exhausted troops were forced to suspend the offensive. Large territorial gains were made by Axis forces, but their campaign had failed to achieve its main objectives: two key cities remained in Soviet hands, the Soviet capability to resist was not broken, and the Soviet Union retained a considerable part of its military potential. The ''blitzkrieg''
phase Phase or phases may refer to: Science *State of matter, or phase, one of the distinct forms in which matter can exist *Phase (matter), a region of space throughout which all physical properties are essentially uniform *Phase space, a mathematica ...
of the war in Europe had ended. By early December, freshly mobilised reserves allowed the Soviets to achieve numerical parity with Axis troops. This, as well as intelligence data which established that a minimal number of Soviet troops in the East would be sufficient to deter any attack by the Japanese
Kwantung Army The Kwantung Army (Japanese language, Japanese: 関東軍, ''Kantō-gun'') was a Armies of the Imperial Japanese Army, general army of the Imperial Japanese Army from 1919 to 1945. The Kwantung Army was formed in 1906 as a security force for th ...
, allowed the Soviets to begin a massive counter-offensive that started on 5 December all along the front and pushed German troops west.


War breaks out in the Pacific (1941)

Following the Japanese
false flag A false flag operation is an act committed with the intent of disguising the actual source of responsibility and pinning blame on another party. The term "false flag" originated in the 16th century as an expression meaning an intentional misrep ...
Mukden incident in 1931, the Japanese shelling of the American gunboat ''USS Panay'' in 1937, and the 1937–1938
Nanjing Massacre The Nanjing Massacre, or the Rape of Nanjing (formerly Chinese postal romanization, romanized as ''Nanking'') was the mass murder of Chinese civilians, noncombatants, and surrendered prisoners of war by the Imperial Japanese Army in Nanji ...
, Japanese-American relations deteriorated. In 1939, the United States notified Japan that it would not be extending its trade treaty and American public opinion opposing Japanese expansionism led to a series of economic sanctions—the
Export Control Act The Export Control Act of 1940 was one in a series of legislative efforts by the US government and initially the administration of President Franklin D. Roosevelt to accomplish two tasks: to avoid scarcity of critical commodities in a likely p ...
s—which banned US exports of chemicals, minerals and military parts to Japan, and increased economic pressure on the Japanese regime.Maechling, Charles. ''Pearl Harbor: The First Energy War''. History Today. December 2000 During 1939 Japan launched its first attack against Changsha, but was repulsed by late September. Despite several offensives by both sides, by 1940 the war between China and Japan was at a stalemate. To increase pressure on China by blocking supply routes, and to better position Japanese forces in the event of a war with the Western powers, Japan invaded and occupied northern Indochina in September 1940. Chinese nationalist forces launched a large-scale counter-offensive in early 1940. In August, Chinese communists launched an offensive in Central China; in retaliation, Japan instituted harsh measures in occupied areas to reduce human and material resources for the communists. Continued antipathy between Chinese communist and nationalist forces culminated in armed clashes in January 1941, effectively ending their co-operation. In March, the Japanese 11th army attacked the headquarters of the Chinese 19th army but was repulsed during the Battle of Shanggao. In September, Japan attempted to take the city of Changsha again and clashed with Chinese nationalist forces. German successes in Europe prompted Japan to increase pressure on European governments in
Southeast Asia Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...
. The Dutch government agreed to provide Japan with oil supplies from the
Dutch East Indies The Dutch East Indies, also known as the Netherlands East Indies (; ), was a Dutch Empire, Dutch colony with territory mostly comprising the modern state of Indonesia, which Proclamation of Indonesian Independence, declared independence on 17 Au ...
, but negotiations for additional access to their resources ended in failure in June 1941. In July 1941 Japan sent troops to southern Indochina, thus threatening British and Dutch possessions in the Far East. The United States, the United Kingdom, and other Western governments reacted to this move with a freeze on Japanese assets and a total oil
embargo Economic sanctions or embargoes are commercial and financial penalties applied by states or institutions against states, groups, or individuals. Economic sanctions are a form of coercion that attempts to get an actor to change its behavior throu ...
. At the same time, Japan was planning an invasion of the Soviet Far East, intending to take advantage of the German invasion in the west, but abandoned the operation after the sanctions. Since early 1941, the United States and Japan had been engaged in negotiations in an attempt to improve their strained relations and end the war in China. During these negotiations, Japan advanced a number of proposals which were dismissed by the Americans as inadequate. At the same time the United States, the United Kingdom, and the Netherlands engaged in secret discussions for the joint defence of their territories, in the event of a Japanese attack against any of them. Roosevelt reinforced the Philippines (an American protectorate scheduled for independence in 1946) and warned Japan that the United States would react to Japanese attacks against any "neighboring countries". Frustrated at the lack of progress and feeling the pinch of the American–British–Dutch sanctions, Japan prepared for war. Emperor
Hirohito , Posthumous name, posthumously honored as , was the 124th emperor of Japan according to the traditional order of succession, from 25 December 1926 until Death and state funeral of Hirohito, his death in 1989. He remains Japan's longest-reigni ...
, after initial hesitation about Japan's chances of victory, began to favour Japan's entry into the war. As a result, Prime Minister
Fumimaro Konoe was a Japanese politician who served as Prime Minister of Japan from 1937 to 1939 and from 1940 to 1941. He presided over the Japanese invasion of China in 1937 and breakdown in relations with the United States, which shortly after his t ...
resigned. Hirohito refused the recommendation to appoint
Prince Naruhiko Higashikuni was a member of the Japanese imperial family and general of the army who served as prime minister of Japan from 17 August to 9 October 1945. He is the only member of the Japanese imperial family to head a cabinet, and Japan's shortest-servin ...
in his place, choosing War Minister
Hideki Tojo was a Japanese general and statesman who served as Prime Minister of Japan from 1941 to 1944 during the Second World War. His leadership was marked by widespread state violence and mass killings perpetrated in the name of Japanese nationalis ...
instead. On 3 November, Nagano explained in detail the plan of the
attack on Pearl Harbor The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Empire of Japan on the United States Pacific Fleet at Naval Station Pearl Harbor, its naval base at Pearl Harbor on Oahu, Territory of ...
to the Emperor. On 5 November, Hirohito approved in imperial conference the operations plan for the war. On 20 November, the new government presented an interim proposal as its final offer. It called for the end of American aid to China and for lifting the embargo on the supply of oil and other resources to Japan. In exchange, Japan promised not to launch any attacks in Southeast Asia and to withdraw its forces from southern Indochina. The American counter-proposal of 26 November required that Japan evacuate all of China without conditions and conclude non-aggression pacts with all Pacific powers. That meant Japan was essentially forced to choose between abandoning its ambitions in China, or seizing the natural resources it needed in the Dutch East Indies by force; the Japanese military did not consider the former an option, and many officers considered the oil embargo an unspoken declaration of war. Japan planned to seize European colonies in Asia to create a large defensive perimeter stretching into the Central Pacific. The Japanese would then be free to exploit the resources of Southeast Asia while exhausting the over-stretched Allies by fighting a defensive war. To prevent American intervention while securing the perimeter, it was further planned to neutralise the
United States Pacific Fleet The United States Pacific Fleet (USPACFLT) is a theater-level component command of the United States Navy, located in the Pacific Ocean. It provides naval forces to the Indo-Pacific Command. Fleet headquarters is at Joint Base Pearl Harbor� ...
and the American military presence in the Philippines from the outset. On 7 December 1941 (8 December in Asian time zones), Japan attacked British and American holdings with near-simultaneous offensives against Southeast Asia and the Central Pacific. These included an attack on the American fleets at Pearl Harbor and the Philippines, as well as invasions of
Guam Guam ( ; ) is an island that is an Territories of the United States, organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. Guam's capital is Hagåtña, Guam, Hagåtña, and the most ...
,
Wake Island Wake Island (), also known as Wake Atoll, is a coral atoll in the Micronesia subregion of the Pacific Ocean. The atoll is composed of three islets – Wake, Wilkes, and Peale Islands – surrounding a lagoon encircled by a coral reef. The neare ...
, Malaya,
Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...
, and
Hong Kong Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...
. These attacks led the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
,
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
, China, Australia, and several other states to formally declare war on Japan, whereas the Soviet Union, being heavily involved in large-scale hostilities with European Axis countries, maintained its neutrality agreement with Japan. Germany, followed by the other Axis states, declared war on the United States in solidarity with Japan, citing as justification the American attacks on German war vessels that had been ordered by Roosevelt.


Axis advance stalls (1942–1943)

On 1 January 1942, the Allied Big Four—the Soviet Union, China, the United Kingdom, and the United States—and 22 smaller or exiled governments issued the
Declaration by United Nations The Declaration by United Nations was the main treaty that formalized the Allies of World War II and was signed by 47 national governments between 1942 and 1945. On 1 January 1942, during the Arcadia Conference in Washington D.C., the Allied " B ...
, thereby affirming the
Atlantic Charter The Atlantic Charter was a statement issued on 14 August 1941 that set out American and British goals for the world after the end of World War II, months before the US officially entered the war. The joint statement, later dubbed the Atlantic C ...
and agreeing not to sign a separate peace with the Axis powers. During 1942, Allied officials debated on the appropriate grand strategy to pursue. All agreed that defeating Germany was the primary objective. The Americans favoured a straightforward, large-scale attack on Germany through France. The Soviets demanded a second front. The British argued that military operations should target peripheral areas to wear out German strength, leading to increasing demoralisation, and bolstering resistance forces; Germany itself would be subject to a heavy bombing campaign. An offensive against Germany would then be launched primarily by Allied armour, without using large-scale armies. Eventually, the British persuaded the Americans that a landing in France was infeasible in 1942 and they should instead focus on driving the Axis out of North Africa. At the
Casablanca Conference The Casablanca Conference (codenamed SYMBOL) or Anfa Conference was held in Casablanca, French Morocco, from January 14 to 24, 1943, to plan the Allies of World War II, Allied European strategy for the next phase of World War II. The main disc ...
in early 1943, the Allies reiterated the statements issued in the 1942 Declaration and demanded the
unconditional surrender An unconditional surrender is a surrender in which no guarantees, reassurances, or promises (i.e., conditions) are given to the surrendering party. It is often demanded with the threat of complete destruction, extermination or annihilation. Anno ...
of their enemies. The British and Americans agreed to continue to press the initiative in the Mediterranean by invading Sicily to fully secure the Mediterranean supply routes. Although the British argued for further operations in the Balkans to bring Turkey into the war, in May 1943, the Americans extracted a British commitment to limit Allied operations in the Mediterranean to an invasion of the Italian mainland, and to invade France in 1944.


Pacific (1942–1943)

By the end of April 1942, Japan and its ally
Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...
had almost conquered
Burma Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and ha ...
, Malaya, the Dutch East Indies,
Singapore Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...
, and
Rabaul Rabaul () is a township in the East New Britain province of Papua New Guinea, on the island of New Britain. It lies about to the east of the island of New Guinea. Rabaul was the provincial capital and most important settlement in the province ...
, inflicting severe losses on Allied troops and taking a large number of prisoners. Despite stubborn resistance by Filipino and US forces, the
Philippine Commonwealth The Commonwealth of the Philippines (; ) was an unincorporated territory and commonwealth of the United States that existed from 1935 to 1946. It was established following the Tydings–McDuffie Act to replace the Insular Government of the Phi ...
was eventually captured in May 1942, forcing its government into exile. On 16 April, in Burma, 7,000 British soldiers were encircled by the Japanese 33rd Division during the Battle of Yenangyaung and rescued by the Chinese 38th Division. Japanese forces also achieved naval victories in the
South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by South China, in the west by the Indochinese Peninsula, in the east by the islands of Taiwan island, Taiwan and northwestern Philippines (mainly Luz ...
,
Java Sea The Java Sea (, ) is an extensive shallow sea on the Sunda Shelf, between the Indonesian islands of Borneo to the north, Java to the south, Sumatra to the west, and Sulawesi to the east. Karimata Strait to its northwest links it to the South Ch ...
, and
Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approximately 20% of the water area of Earth#Surface, Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia (continent), ...
, and bombed the Allied naval base at Darwin, Australia. In January 1942, the only Allied success against Japan was a Chinese victory at Changsha. These easy victories over the unprepared US and European opponents left Japan overconfident, and overextended. In early May 1942, Japan initiated operations to capture Port Moresby by
amphibious assault Amphibious warfare is a type of offensive military operation that today uses naval ships to project ground and air power onto a hostile or potentially hostile shore at a designated landing beach. Through history the operations were conducte ...
and thus sever communications and supply lines between the United States and Australia. The planned invasion was thwarted when an Allied task force, centred on two American fleet carriers, fought Japanese naval forces to a draw in the
Battle of the Coral Sea The Battle of the Coral Sea, from 4 to 8 May 1942, was a major naval battle between the Imperial Japanese Navy (IJN) and naval and air forces of the United States and Australia. Taking place in the Pacific Theatre of World War II, the battle ...
. Japan's next plan, motivated by the earlier Doolittle Raid, was to seize
Midway Atoll Midway Atoll (colloquialism, colloquial: Midway Islands; ; ) is a atoll in the North Pacific Ocean. Midway Atoll is an insular area of the United States and is an Insular area#Unorganized unincorporated territories, unorganized and unincorpo ...
and lure American carriers into battle to be eliminated; as a diversion, Japan would also send forces to occupy the Aleutian Islands in Alaska. In mid-May, Japan started the Zhejiang-Jiangxi campaign in China, with the goal of inflicting retribution on the Chinese who aided the surviving American airmen in the Doolittle Raid by destroying Chinese air bases and fighting against the Chinese 23rd and 32nd Army Groups. In early June, Japan put its operations into action, but the Americans had broken Japanese naval codes in late May and were fully aware of the plans and order of battle, and used this knowledge to achieve a decisive victory at Midway over the
Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, Potsdam Declaration, when it was dissolved followin ...
. With its capacity for aggressive action greatly diminished as a result of the Midway battle, Japan attempted to capture
Port Moresby (; Tok Pisin: ''Pot Mosbi''), also referred to as Pom City or simply Moresby, is the capital and largest city of Papua New Guinea. It is one of the largest cities in the southwestern Pacific (along with Jayapura) outside of Australia and New ...
by an
overland campaign The Overland Campaign, also known as Grant's Overland Campaign and the Wilderness Campaign, was a series of battles fought in Virginia during May and June 1864, towards the end of the American Civil War. Lieutenant general (United States), Lt. G ...
in the
Territory of Papua The Territory of Papua comprised the southeastern quarter of the island of New Guinea from 1883 to 1975. In 1883, the Government of Queensland annexed this territory for the British Empire. The United Kingdom Government refused to ratify the ...
. The Americans planned a counterattack against Japanese positions in the southern
Solomon Islands Solomon Islands, also known simply as the Solomons,John Prados, ''Islands of Destiny'', Dutton Caliber, 2012, p,20 and passim is an island country consisting of six major islands and over 1000 smaller islands in Melanesia, part of Oceania, t ...
, primarily
Guadalcanal Guadalcanal (; indigenous name: ''Isatabu'') is the principal island in Guadalcanal Province of Solomon Islands, located in the southwestern Pacific Ocean, northeast of Australia. It is the largest island in the Solomons by area and the second- ...
, as a first step towards capturing
Rabaul Rabaul () is a township in the East New Britain province of Papua New Guinea, on the island of New Britain. It lies about to the east of the island of New Guinea. Rabaul was the provincial capital and most important settlement in the province ...
, the main Japanese base in Southeast Asia. Both plans started in July, but by mid-September, the Battle for Guadalcanal took priority for the Japanese, and troops in New Guinea were ordered to withdraw from the Port Moresby area to the northern part of the island, where they faced Australian and United States troops in the
Battle of Buna–Gona The battle of Buna–Gona was part of the New Guinea campaign in the Pacific War, Pacific theatre during World War II. It followed the conclusion of the Kokoda Track campaign and lasted from 16 November 1942 until 22 January 1943. The battle wa ...
. Guadalcanal soon became a focal point for both sides with heavy commitments of troops and ships in the battle for Guadalcanal. By the start of 1943, the Japanese were defeated on the island and withdrew their troops. In Burma, Commonwealth forces mounted two operations. The first was a disastrous offensive into the Arakan region in late 1942 that forced a retreat back to India by May 1943. The second was the insertion of irregular forces behind Japanese frontlines in February which, by the end of April, had achieved mixed results.


Eastern Front (1942–1943)

Despite considerable losses, in early 1942 Germany and its allies stopped a major Soviet offensive in central and
southern Russia Southern Russia or the South of Russia ( rus, Юг России, p=juk rɐˈsʲiɪ) is a Colloquialism, colloquial term for the southernmost geographic portion of European Russia. The term is generally used to refer to the region of Russia's So ...
, keeping most territorial gains they had achieved during the previous year. In May, the Germans defeated Soviet offensives in the
Kerch Peninsula The Kerch Peninsula is a major and prominent geographic peninsula located at the eastern end of the Crimean Peninsula. This peninsula stretches eastward toward the Taman Peninsula between the Sea of Azov and the Black Sea. Most of the peninsula i ...
and at
Kharkov Kharkiv, also known as Kharkov, is the second-largest List of cities in Ukraine, city in Ukraine.
, and then in June 1942 launched their main summer offensive against southern Russia, to seize the oil fields of the Caucasus and occupy the
Kuban Kuban ( Russian and Ukrainian: Кубань; ) is a historical and geographical region in the North Caucasus region of southern Russia surrounding the Kuban River, on the Black Sea between the Don Steppe, the Volga Delta and separated fr ...
steppe In physical geography, a steppe () is an ecoregion characterized by grassland plains without closed forests except near rivers and lakes. Steppe biomes may include: * the montane grasslands and shrublands biome * the tropical and subtropica ...
, while maintaining positions on the northern and central areas of the front. The Germans split
Army Group South Army Group South () was the name of one of three German Army Groups during World War II. It was first used in the 1939 September Campaign, along with Army Group North to invade Poland. In the invasion of Poland, Army Group South was led by Ge ...
into two groups:
Army Group A Army Group A () was the name of three distinct army groups of the ''German Army (1935–1945), Heer'', the ground forces of the ''Wehrmacht'', during World War II. The first Army Group A, previously known as "Army Group South", was active from Oct ...
advanced to the lower Don River and struck south-east to the Caucasus, while
Army Group B Army Group B () was the name of four distinct German Army Group, army group commands that saw action during World War II. The first Army Group B was created on 12 October 1939 (from the former Army Group North) and fought in the Battle of France ...
headed towards the
Volga River The Volga (, ) is the longest river in Europe and the longest endorheic basin river in the world. Situated in Russia, it flows through Central Russia to Southern Russia and into the Caspian Sea. The Volga has a length of , and a catchment ...
. The Soviets decided to make their stand at Stalingrad on the Volga. By mid-November, the Germans had nearly taken Stalingrad in bitter
street fighting Street fighting or street combat is hand-to-hand combat in public places between individuals or groups of people. The venue is usually a public place (e.g., a street), and the fight sometimes results in serious injury or even death. Some street ...
. The Soviets began their second winter counter-offensive, starting with an encirclement of German forces at Stalingrad, and an assault on the Rzhev salient near Moscow, though the latter failed disastrously. By early February 1943, the German Army had taken tremendous losses; German troops at Stalingrad had been defeated, and the front-line had been pushed back beyond its position before the summer offensive. In mid-February, after the Soviet push had tapered off, the Germans launched another attack on Kharkov, creating a salient in their front line around the Soviet city of
Kursk Kursk (, ) is a types of inhabited localities in Russia, city and the administrative center of Kursk Oblast, Russia, located at the confluence of the Kur (Kursk Oblast), Kur, Tuskar, and Seym (river), Seym rivers. It has a population of Kursk ...
.


Western Europe/Atlantic and Mediterranean (1942–1943)

Exploiting poor American naval command decisions, the German navy ravaged Allied shipping off the American Atlantic coast. By November 1941, Commonwealth forces had launched a counter-offensive in North Africa,
Operation Crusader Operation Crusader (18 November – 30 December 1941) was a military operation of the Western Desert campaign during World War II by the British Eighth Army (with Commonwealth, Indian and Allied contingents) against the Axis forces (German and ...
, and reclaimed all the gains the Germans and Italians had made. The Germans also launched a North African offensive in January, pushing the British back to positions at the Gazala line by early February, followed by a temporary lull in combat which Germany used to prepare for their upcoming offensives. Concerns that the Japanese might use bases in Vichy-held Madagascar caused the British to invade the island in early May 1942. An Axis offensive in Libya forced an Allied retreat deep inside Egypt until Axis forces were stopped at El Alamein. On the Continent, raids of Allied
commando A commando is a combatant, or operative of an elite light infantry or special operations force, specially trained for carrying out raids and operating in small teams behind enemy lines. Originally, "a commando" was a type of combat unit, as oppo ...
s on strategic targets, culminating in the failed
Dieppe Raid Operation Jubilee or the Dieppe Raid (19 August 1942) was a disastrous Allied amphibious attack on the German-occupied port of Dieppe in northern France, during the Second World War. Over 6,050 infantry, predominantly Canadian, supported by a ...
, demonstrated the Western Allies' inability to launch an invasion of continental Europe without much better preparation, equipment, and operational security. In August 1942, the Allies succeeded in repelling a second attack against El Alamein and, at a high cost, managed to deliver desperately needed supplies to the besieged Malta. A few months later, the Allies commenced an attack of their own in Egypt, dislodging the Axis forces and beginning a drive west across Libya. This attack was followed up shortly after by Anglo-American landings in French North Africa, which resulted in the region joining the Allies. Hitler responded to the French colony's defection by ordering the occupation of Vichy France; although Vichy forces did not resist this violation of the armistice, they managed to scuttle their fleet to prevent its capture by German forces. Axis forces in Africa withdrew into
Tunisia Tunisia, officially the Republic of Tunisia, is a country in the Maghreb region of North Africa. It is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisia also shares m ...
, which was conquered by the Allies in May 1943. In June 1943, the British and Americans began a strategic bombing campaign against Germany with a goal to disrupt the war economy, reduce morale, and " de-house" the civilian population. The firebombing of Hamburg was among the first attacks in this campaign, inflicting significant casualties and considerable losses on infrastructure of this important industrial centre.


Allies gain momentum (1943–1944)

After the Guadalcanal campaign, the Allies initiated several operations against Japan in the Pacific. In May 1943, Canadian and US forces were sent to eliminate Japanese forces from the Aleutians. Soon after, the United States, with support from Australia, New Zealand and Pacific Islander forces, began major ground, sea and air operations to isolate Rabaul by capturing surrounding islands, and breach the Japanese Central Pacific perimeter at the Gilbert and Marshall Islands. By the end of March 1944, the Allies had completed both of these objectives and had also neutralised the major Japanese base at Truk in the
Caroline Islands The Caroline Islands (or the Carolines) are a widely scattered archipelago of tiny islands in the western Pacific Ocean, to the north of New Guinea. Politically, they are divided between the Federated States of Micronesia (FSM) in the cen ...
. In April, the Allies launched an operation to retake Western New Guinea. In the Soviet Union, both the Germans and the Soviets spent the spring and early summer of 1943 preparing for large offensives in
central Russia Central Russia is, broadly, the various areas in European Russia. Historically, the area of Central Russia varied based on the purpose for which it is being used. It may, for example, refer to European Russia (except the North Caucasus and ...
. On 5 July 1943, Germany attacked Soviet forces around the Kursk Bulge. Within a week, German forces had exhausted themselves against the Soviets' well-constructed defences, and for the first time in the war, Hitler cancelled an operation before it had achieved tactical or operational success. This decision was partially affected by the Western Allies' invasion of Sicily launched on 9 July, which, combined with previous Italian failures, resulted in the ousting and arrest of Mussolini later that month. On 12 July 1943, the Soviets launched their own counter-offensives, thereby dispelling any chance of German victory or even stalemate in the east. The Soviet victory at Kursk marked the end of German superiority, giving the Soviet Union the initiative on the Eastern Front. The Germans tried to stabilise their eastern front along the hastily fortified Panther–Wotan line, but the Soviets broke through it at
Smolensk Smolensk is a city and the administrative center of Smolensk Oblast, Russia, located on the Dnieper River, west-southwest of Moscow. First mentioned in 863, it is one of the oldest cities in Russia. It has been a regional capital for most of ...
and the Lower Dnieper Offensive. On 3 September 1943, the Western Allies invaded the Italian mainland, following Italy's armistice with the Allies and the ensuing German occupation of Italy. Germany, with the help of fascists, responded to the armistice by disarming Italian forces that were in many places without superior orders, seizing military control of Italian areas, and creating a series of defensive lines. German special forces then rescued Mussolini, who then soon established a new client state in German-occupied Italy named the
Italian Social Republic The Italian Social Republic (, ; RSI; , ), known prior to December 1943 as the National Republican State of Italy (; SNRI), but more popularly known as the Republic of Salò (, ), was a List of World War II puppet states#Germany, German puppe ...
, causing an
Italian civil war The Italian Civil War (, ) was a civil war in the Kingdom of Italy fought during the Liberation of Italy, Italian campaign of World War II between Italian fascists and Italian resistance movement, Italian partisans (mostly politically organized ...
. The Western Allies fought through several lines until reaching the main German defensive line in mid-November. German operations in the Atlantic also suffered. By May 1943, as Allied counter-measures became increasingly effective, the resulting sizeable German submarine losses forced a temporary halt of the German Atlantic naval campaign. In November 1943,
Franklin D. Roosevelt Franklin Delano Roosevelt (January 30, 1882April 12, 1945), also known as FDR, was the 32nd president of the United States, serving from 1933 until his death in 1945. He is the longest-serving U.S. president, and the only one to have served ...
and Winston Churchill met with Chiang Kai-shek in Cairo and then with Joseph Stalin in Tehran.. The former conference determined the post-war return of Japanese territory. and the military planning for the
Burma campaign The Burma campaign was a series of battles fought in the British colony of British rule in Burma, Burma as part of the South-East Asian theatre of World War II. It primarily involved forces of the Allies of World War II, Allies (mainly from ...
, while the latter included agreement that the Western Allies would invade Europe in 1944 and that the Soviet Union would declare war on Japan within three months of Germany's defeat.. From November 1943, during the seven-week Battle of Changde, the Chinese awaited allied relief as they forced Japan to fight a costly war of attrition... In January 1944, the Allies launched a series of attacks in Italy against the line at Monte Cassino and tried to outflank it with landings at Anzio. On 27 January 1944,
Soviet The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
troops launched a major offensive that expelled German forces from the Leningrad region, thereby ending the most lethal siege in history.. The following Soviet offensive was halted on the pre-war Estonian border by the German
Army Group North Army Group North () was the name of three separate army groups of the Wehrmacht during World War II. Its rear area operations were organized by the Army Group North Rear Area. The first Army Group North was deployed during the invasion of Pol ...
aided by
Estonians Estonians or Estonian people () are a Finnic ethnic group native to the Baltic Sea region in Northern Europe, primarily their nation state of Estonia. Estonians primarily speak the Estonian language, a language closely related to other Finni ...
hoping to re-establish national independence. This delay slowed subsequent Soviet operations in the
Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North European Plain, North and Central European Plain regions. It is the ...
region.. By late May 1944, the Soviets had liberated Crimea, largely expelled Axis forces from Ukraine, and made incursions into Romania, which were repulsed by the Axis troops.. The Allied offensives in Italy had succeeded and, at the expense of allowing several German divisions to retreat, Rome was captured on 4 June. The Allies had mixed success in mainland Asia. In March 1944, the Japanese launched the first of two invasions, an operation against Allied positions in Assam, India,. and soon besieged Commonwealth positions at
Imphal Imphal (; , ) is the capital city of the Indian state of Manipur. The metropolitan centre of the city contains the ruins of Kangla Palace (officially known as Kangla Fort), the royal seat of the former Kingdom of Manipur, surrounded by a ...
and
Kohima Kohima (; Tenyidie: Kewhira ()) is the capital of the North East Indian state of Nagaland. With a resident population of almost 100,000, it is the second largest city in the state. Kohima constitutes both a district and a municipality. The m ...
.. In May 1944, British and Indian forces mounted a counter-offensive that drove Japanese troops back to Burma by July, and Chinese forces that had invaded northern Burma in late 1943 besieged Japanese troops in
Myitkyina Myitkyina (, ; Jingpho language, Jinghpaw: ''Myitkyina'', ; , ''Sèna'') is the capital city of Kachin State in Myanmar (Burma), located from Yangon, and from Mandalay. In Burmese language, Burmese it means "near the big river", and Myitkyina i ...
. The second Japanese invasion of China aimed to destroy China's main fighting forces, secure railways between Japanese-held territory and capture Allied airfields. By June, the Japanese had conquered the province of
Henan Henan; alternatively Honan is a province in Central China. Henan is home to many heritage sites, including Yinxu, the ruins of the final capital of the Shang dynasty () and the Shaolin Temple. Four of the historical capitals of China, Lu ...
and begun a new attack on Changsha.


Allies close in (1944)

On 6 June 1944 (commonly known as
D-Day The Normandy landings were the landing operations and associated airborne operations on 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during the Second World War. Codenamed Operation Neptune and often referred to as ...
), after three years of Soviet pressure,: "Stalin always believed that Britain and America were delaying the second front so that the Soviet Union would bear the brunt of the war." the Western Allies invaded northern France. After reassigning several Allied divisions from Italy, they also attacked southern France.. These landings were successful and led to the defeat of the German Army units in France.
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
was liberated on 25 August by the local resistance assisted by the
Free French Forces __NOTOC__ The French Liberation Army ( ; AFL) was the reunified French Army that arose from the merging of the Armée d'Afrique with the prior Free French Forces (; FFL) during World War II. The military force of Free France, it participated ...
, both led by General
Charles de Gaulle Charles André Joseph Marie de Gaulle (22 November 18909 November 1970) was a French general and statesman who led the Free France, Free French Forces against Nazi Germany in World War II and chaired the Provisional Government of the French Re ...
, and the Western Allies continued to push back German forces in western Europe during the latter part of the year. An attempt to advance into northern Germany spearheaded by a major airborne operation in the Netherlands failed. After that, the Western Allies slowly pushed into Germany, but failed to cross the Ruhr river. In Italy, the Allied advance slowed due to the last major German defensive line. On 22 June, the Soviets launched a strategic offensive in Belarus ("
Operation Bagration Operation Bagration () was the codename for the 1944 Soviet Byelorussian strategic offensive operation (), a military campaign fought between 22 June and 19 August 1944 in Byelorussian Soviet Socialist Republic, Soviet Byelorussia in the Eastern ...
") that nearly destroyed the German
Army Group Centre Army Group Centre () was the name of two distinct strategic German Army Groups that fought on the Eastern Front in World War II. The first Army Group Centre was created during the planning of Operation Barbarossa, Germany's invasion of the So ...
.: "It was the most calamitous defeat of all the German armed forces in World War II." Soon after that, another Soviet strategic offensive forced German troops from Western Ukraine and Eastern Poland. The Soviets formed the
Polish Committee of National Liberation The Polish Committee of National Liberation ( Polish: ''Polski Komitet Wyzwolenia Narodowego'', ''PKWN''), also known as the Lublin Committee, was an executive governing authority established by the Soviet-backed communists in Poland at the la ...
to control territory in Poland and combat the Polish
Armia Krajowa The Home Army (, ; abbreviated AK) was the dominant resistance movement in German-occupied Poland during World War II. The Home Army was formed in February 1942 from the earlier Związek Walki Zbrojnej (Armed Resistance) established in the ...
; the Soviet Red Army remained in the
Praga Praga is a district of Warsaw, Poland. It is on the east bank of the river Vistula. First mentioned in 1432, until 1791 it formed a separate town with its own city charter. History The historical Praga was a small settlement located at the e ...
district on the other side of the
Vistula The Vistula (; ) is the longest river in Poland and the ninth-longest in Europe, at in length. Its drainage basin, extending into three other countries apart from Poland, covers , of which is in Poland. The Vistula rises at Barania Góra i ...
and watched passively as the Germans quelled the
Warsaw Uprising The Warsaw Uprising (; ), sometimes referred to as the August Uprising (), or the Battle of Warsaw, was a major World War II operation by the Polish resistance movement in World War II, Polish underground resistance to liberate Warsaw from ...
initiated by the Armia Krajowa. The national uprising in
Slovakia Slovakia, officially the Slovak Republic, is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the west, and the Czech Republic to the northwest. Slovakia's m ...
was also quelled by the Germans. The Soviet
Red Army The Workers' and Peasants' Red Army, often shortened to the Red Army, was the army and air force of the Russian Soviet Republic and, from 1922, the Soviet Union. The army was established in January 1918 by a decree of the Council of People ...
's strategic offensive in eastern Romania cut off and destroyed the considerable German troops there and triggered a successful coup d'état in Romania and in Bulgaria, followed by those countries' shift to the Allied side. In September 1944, Soviet troops advanced into
Yugoslavia , common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p ...
and forced the rapid withdrawal of German Army Groups E and F in
Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
,
Albania Albania ( ; or ), officially the Republic of Albania (), is a country in Southeast Europe. It is located in the Balkans, on the Adriatic Sea, Adriatic and Ionian Seas within the Mediterranean Sea, and shares land borders with Montenegro to ...
and Yugoslavia to rescue them from being cut off.. By this point, the communist-led Partisans under Marshal
Josip Broz Tito Josip Broz ( sh-Cyrl, Јосип Броз, ; 7 May 1892 – 4 May 1980), commonly known as Tito ( ; , ), was a Yugoslavia, Yugoslav communist revolutionary and politician who served in various positions of national leadership from 1943 unti ...
, who had led an increasingly successful guerrilla campaign against the occupation since 1941, controlled much of the territory of Yugoslavia and engaged in delaying efforts against German forces further south. In northern
Serbia , image_flag = Flag of Serbia.svg , national_motto = , image_coat = Coat of arms of Serbia.svg , national_anthem = () , image_map = , map_caption = Location of Serbia (gree ...
, the Soviet
Red Army The Workers' and Peasants' Red Army, often shortened to the Red Army, was the army and air force of the Russian Soviet Republic and, from 1922, the Soviet Union. The army was established in January 1918 by a decree of the Council of People ...
, with limited support from Bulgarian forces, assisted the Partisans in a joint liberation of the capital city of Belgrade on 20 October. A few days later, the Soviets launched a massive assault against German-occupied Hungary that lasted until the fall of Budapest in February 1945. Unlike impressive Soviet victories in the Balkans, bitter Finnish resistance to the Soviet offensive in the
Karelian Isthmus The Karelian Isthmus (; ; ) is the approximately stretch of land situated between the Gulf of Finland and Lake Ladoga in northwestern Russia, to the north of the River Neva. Its northwestern boundary is a line from the Bay of Vyborg to the we ...
denied the Soviets occupation of Finland and led to a Moscow Armistice, Soviet-Finnish armistice on relatively mild conditions, although Finland was forced to Lapland War, fight their former German allies. By the start of July 1944, Commonwealth forces in Southeast Asia had repelled the Japanese sieges in Assam, pushing the Japanese back to the Chindwin River. while the Chinese captured Myitkyina. In September 1944, Chinese forces Battle of Mount Song, captured Mount Song and reopened the Burma Road. In China, the Japanese had more successes, having finally Battle of Changsha (1944), captured Changsha in mid-June and the city of Battle of Hengyang, Hengyang by early August. Soon after, they invaded the province of Guangxi, winning major engagements against Chinese forces at Battle of Guilin–Liuzhou, Guilin and Liuzhou by the end of November and successfully linking up their forces in China and Indochina by mid-December.. In the Pacific, US forces continued to push back the Japanese perimeter. In mid-June 1944, they began their Mariana and Palau Islands campaign, offensive against the Mariana and Palau islands and decisively defeated Japanese forces in the Battle of the Philippine Sea. These defeats led to the resignation of the Japanese Prime Minister,
Hideki Tojo was a Japanese general and statesman who served as Prime Minister of Japan from 1941 to 1944 during the Second World War. His leadership was marked by widespread state violence and mass killings perpetrated in the name of Japanese nationalis ...
, and provided the United States with air bases to launch intensive heavy bomber attacks on the Japanese home islands. In late October, American forces Battle of Leyte, invaded the Filipino island of Leyte; soon after, Allied naval forces scored another large victory in the Battle of Leyte Gulf, one of the largest naval battles in history.


Axis collapse and Allied victory (1944–1945)

On 16 December 1944, Germany made a last attempt to split the Allies on the Western Front by using most of its remaining reserves to launch Battle of the Bulge, a massive counter-offensive in the Ardennes and Operation Northwind (1944), along the French-German border, hoping to encircle large portions of Western Allied troops and prompt a political settlement after capturing their primary supply port at Antwerp. By 16 January 1945, this offensive had been repulsed with no strategic objectives fulfilled. In Italy, the Western Allies remained stalemated at the German defensive line. In mid-January 1945, the Red Army attacked in Poland, Vistula–Oder offensive, pushing from the Vistula to the Oder river in Germany, and East Prussian offensive, overran East Prussia. On 4 February Soviet, British, and US leaders met for the Yalta Conference. They agreed on the occupation of post-war Germany, and on when the Soviet Union would join the war against Japan. In February, the Soviets Silesian offensives, entered Silesia and East Pomeranian offensive, Pomerania, while the Western Allied invasion of Germany, Western Allies entered western Germany and closed to the Rhine river. By March, the Western Allies crossed the Rhine Operation Plunder, north and Remagen, south of the Ruhr (river), Ruhr, Ruhr pocket, encircling the German Army Group B. In early March, in an attempt to protect its last oil reserves in Hungary and retake Budapest, Germany launched Operation Spring Awakening, its last major offensive against Soviet troops near Lake Balaton. Within two weeks, the offensive had been repulsed, the Soviets advanced to Vienna offensive, Vienna, and captured the city. In early April, Soviet troops Battle of Königsberg, captured Königsberg, while the Western Allies finally Spring 1945 offensive in Italy, pushed forward in Italy and swept across western Germany capturing Capture of Hamburg, Hamburg and Battle of Nuremberg (1945), Nuremberg. Elbe Day, American and Soviet forces met at the Elbe river on 25 April, leaving unoccupied pockets in southern Germany and around Berlin. Soviet troops Battle of Berlin, stormed and captured Berlin in late April. In Italy, Surrender of Caserta, German forces surrendered on 29 April, while the
Italian Social Republic The Italian Social Republic (, ; RSI; , ), known prior to December 1943 as the National Republican State of Italy (; SNRI), but more popularly known as the Republic of Salò (, ), was a List of World War II puppet states#Germany, German puppe ...
capitulated two days later. On 30 April, the Reichstag building, Reichstag was captured, signalling the military defeat of Nazi Germany. Major changes in leadership occurred on both sides during this period. On 12 April, President Roosevelt died and was succeeded by his vice president, Harry S. Truman. Benito Mussolini Death of Benito Mussolini, was killed by Italian resistance movement, Italian partisans on 28 April.. On 30 April, Death of Adolf Hitler, Hitler committed suicide in his Führerbunker, headquarters, and was succeeded by Grand Admiral Karl Dönitz (as President of Germany (1919–1945), President of the Reich) and Joseph Goebbels (as Chancellor of the Reich); Goebbels also committed suicide on the following day and was replaced by Lutz Graf Schwerin von Krosigk, in what would later be known as the Flensburg Government. German Instrument of Surrender, Total and unconditional surrender in Europe was signed Victory in Europe Day, on 7and 8May, to be effective by the end of Victory Day (9 May), 8 May.. German Army Group Centre Prague offensive, resisted in Prague until 11 May.. On 23 May all remaining members of the German government were arrested by the Allied Forces in Flensburg, while on 5 June all German political and military institutions were transferred under the control of the Allies through the Berlin Declaration (1945), Berlin Declaration. In the Pacific theatre, American forces accompanied by the forces of the
Philippine Commonwealth The Commonwealth of the Philippines (; ) was an unincorporated territory and commonwealth of the United States that existed from 1935 to 1946. It was established following the Tydings–McDuffie Act to replace the Insular Government of the Phi ...
advanced Philippines campaign (1944–1945), in the Philippines, Battle of Leyte, clearing Leyte by the end of April 1945. They Battle of Luzon, landed on Luzon in January 1945 and Battle of Manila (1945), recaptured Manila in March. Fighting continued on Luzon, Battle of Mindanao, Mindanao, and other islands of the Philippines until the End of World War II in Asia, end of the war. Meanwhile, the United States Army Air Forces launched Air raids on Japan, a massive firebombing campaign of strategic cities in Japan in an effort to destroy Japanese war industry and civilian morale. A devastating Bombing of Tokyo, bombing raid on Tokyo of 9–10 March was the deadliest conventional bombing raid in history. In May 1945, Australian troops Borneo campaign, landed in Borneo, overrunning the oilfields there. British, American, and Chinese forces defeated the Japanese in northern Burma campaign, Burma in March, and the British pushed on to reach Yangon, Rangoon by 3 May.. Chinese forces started a counterattack in the Battle of West Hunan that occurred between 6 April and 7 June 1945. American naval and amphibious forces also moved towards Japan, taking Battle of Iwo Jima, Iwo Jima by March, and Battle of Okinawa, Okinawa by the end of June. At the same time, a naval blockade by Allied submarines in the Pacific War, submarines was strangling Japan's economy and drastically reducing its ability to supply overseas forces. On 11 July, Allied leaders Potsdam Conference, met in Potsdam, Germany. They Potsdam Agreement, confirmed earlier agreements about Germany,. and the American, British and Chinese governments reiterated the demand for unconditional surrender of Japan, specifically stating that "Potsdam Declaration, the alternative for Japan is prompt and utter destruction".. During this conference, the United Kingdom 1945 United Kingdom general election, held its general election, and Clement Attlee replaced Churchill as Prime Minister.. The call for unconditional surrender was rejected by the Japanese government, which believed it would be capable of negotiating for more favourable surrender terms. In early August, the United States dropped atomic bombs on the Japanese cities of
Hiroshima is the capital of Hiroshima Prefecture in Japan. , the city had an estimated population of 1,199,391. The gross domestic product (GDP) in Greater Hiroshima, Hiroshima Urban Employment Area, was US$61.3 billion as of 2010. Kazumi Matsui has b ...
and
Nagasaki , officially , is the capital and the largest Cities of Japan, city of Nagasaki Prefecture on the island of Kyushu in Japan. Founded by the Portuguese, the port of Portuguese_Nagasaki, Nagasaki became the sole Nanban trade, port used for tr ...
. Between the two bombings, the Soviets, pursuant to the Yalta agreement, Soviet–Japanese War, declared war on Japan, Soviet invasion of Manchuria, invaded Japanese-held Manchuria and quickly defeated the
Kwantung Army The Kwantung Army (Japanese language, Japanese: 関東軍, ''Kantō-gun'') was a Armies of the Imperial Japanese Army, general army of the Imperial Japanese Army from 1919 to 1945. The Kwantung Army was formed in 1906 as a security force for th ...
, which was the largest Japanese fighting force. These two events persuaded previously adamant Imperial Army leaders to accept surrender terms. " The principal cause of Japan's surrender was the ability of the United States to increase the military vulnerability of Japan's home islands, persuading Japanese leaders that defense of the homeland was highly unlikely to succeed. The key military factor causing this effect was the sea blockade, which crippled Japan's ability to produce and equip the forces necessary to execute its strategy. The most important factor accounting for the timing of surrender was the Soviet attack against Manchuria, largely because it persuaded previously adamant Army leaders that the homeland could not be defended.". The Red Army also captured the Soviet invasion of South Sakhalin, southern part of Sakhalin Island and the Invasion of the Kuril Islands, Kuril Islands. On the night of 9–10 August 1945, Emperor Hirohito announced his decision to accept the terms demanded by the Allies in the Potsdam Declaration. On 15 August, the Emperor communicated this decision to the Japanese people through a speech broadcast on the radio (Hirohito surrender broadcast, ''Gyokuon-hōsō'', literally "broadcast in the Emperor's voice"). On 15 August 1945, Surrender of Japan, Japan surrendered, with the Japanese Instrument of Surrender, surrender documents finally signed at Tokyo Bay on the deck of the American battleship on 2 September 1945, ending the war..


Aftermath

The Allies established occupation administrations in
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
and
Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu ...
, both initially divided between western and eastern occupation zones controlled by the Western Allies and the Soviet Union, respectively. However, their paths soon diverged. In Germany, the Trizone, western and Soviet occupation zone in Germany, eastern occupation zones controlled by the Western Allies and the Soviet Union officially ended in 1949, with the respective zones becoming separate countries, West Germany and East Germany.. In Austria, however, occupation continued until 1955, when a joint settlement between the Western Allies and the Soviet Union permitted the reunification of Austria as a democratic state officially non-aligned with any political bloc (although in practice having better relations with the Western Allies). A denazification program in Germany led to the prosecution of Nazi war criminals in the Nuremberg trials and the removal of ex-Nazis from power, although this policy moved towards amnesty and re-integration of ex-Nazis into West German society.. Germany lost a quarter of its pre-war (1937) territory. Among the eastern territories, Silesia, Neumark and most of Pomerania were taken over by Poland, and East Prussia was divided between Poland and the Soviet Union, followed by the Flight and expulsion of Germans (1944–1950), expulsion to Germany of the nine million Germans from these provinces, as well as three million Germans from the
Sudetenland The Sudetenland ( , ; Czech and ) is a German name for the northern, southern, and western areas of former Czechoslovakia which were inhabited primarily by Sudeten Germans. These German speakers had predominated in the border districts of Bohe ...
in Czechoslovakia. By the 1950s, one-fifth of West Germans were refugees from the east. The Soviet Union also took over the Polish provinces east of the Curzon Line, from which Polish population transfers (1944–1946), two million Poles were expelled.. North-east Romania,.. parts of eastern Finland,. and the
Baltic states The Baltic states or the Baltic countries is a geopolitical term encompassing Estonia, Latvia, and Lithuania. All three countries are members of NATO, the European Union, the Eurozone, and the OECD. The three sovereign states on the eastern co ...
were Soviet re-occupation of the Baltic states (1944), annexed into the Soviet Union... Italy 1946 Italian institutional referendum, lost its monarchy, Italian Empire, colonial empire and some Treaty of Paris between Italy and the Allied Powers, European territories. In an effort to maintain world peace,. the Allies formed the
United Nations The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...
, which officially came into existence on 24 October 1945, and adopted the Universal Declaration of Human Rights in 1948 as a common standard for all Member states of the United Nations, member nations..
The UDHR is viewable her

The great powers that were the victors of the war—France, China, the United Kingdom, the Soviet Union and the United States—became the Permanent members of the United Nations Security Council, permanent members of the UN's United Nations Security Council, Security Council. The five permanent members remain so to the present, although there have been two seat changes, United Nations General Assembly Resolution 2758, between the Taiwan, Republic of China and the China, People's Republic of China in 1971, and between the Soviet Union and its Succession of states, successor state, the Russia, Russian Federation, following the dissolution of the Soviet Union in 1991. The alliance between the Western Allies and the Soviet Union had begun to deteriorate even before the war was over.. Besides Germany, the rest of Europe was also divided into Western and Soviet spheres of influence.. Most eastern and central European countries fell into Eastern Bloc, the Soviet sphere, which led to establishment of Communist-led regimes, with full or partial support of the Soviet occupation authorities. As a result, East Germany,. Polish People's Republic, Poland, Hungarian People's Republic, Hungary, Socialist Republic of Romania, Romania, People's Republic of Bulgaria, Bulgaria, Czechoslovak Socialist Republic, Czechoslovakia, and People's Socialist Republic of Albania, Albania. became Soviet Satellite state#Soviet satellite states, satellite states. Communist Socialist Federal Republic of Yugoslavia, Yugoslavia conducted a fully Non-Aligned Movement, independent policy, causing Tito–Stalin split, tension with the Soviet Union.. A Greek Civil War, Communist uprising in Greece was put down with Anglo-American support and the country remained aligned with the West. Post-war division of the world was formalised by two international military alliances, the United States-led NATO and the Soviet-led Warsaw Pact.. The long period of political tensions and military competition between them—the
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
—would be accompanied by an unprecedented arms race and number of
proxy war In political science, a proxy war is an armed conflict where at least one of the belligerents is directed or supported by an external third-party power. In the term ''proxy war'', a belligerent with external support is the ''proxy''; both bel ...
s throughout the world. In Asia, the United States led the occupation of Japan and Trust Territory of the Pacific Islands, administered Japan's former islands in the Western Pacific, while the Soviets annexed South Sakhalin and the Kuril Islands.. Korea, formerly Korea under Japanese rule, under Japanese colonial rule, was Division of Korea, divided and occupied by the Soviet Union in the North Korea, North and the United States in the South Korea, South between 1945 and 1948. Separate republics emerged on both sides of the 38th parallel in 1948, each claiming to be the legitimate government for all of Korea, which led ultimately to the Korean War. In China, nationalist and communist forces resumed Chinese Civil War, the civil war in June 1946. Communist forces were victorious and established the People's Republic of China on the mainland, while nationalist forces retreated to Taiwan in 1949.. In the Middle East, the Arab rejection of the United Nations Partition Plan for Palestine and the creation of Israel marked the escalation of the Arab–Israeli conflict. While European powers attempted to retain some or all of their colonial empires, their losses of prestige and resources during the war rendered this unsuccessful, leading to Decolonization, decolonisation.. The global economy suffered heavily from the war, although participating nations were affected differently. The United States emerged much richer than any other nation, leading to a Mid-20th century baby boom, baby boom, and by 1950 its gross domestic product per person was much higher than that of any of the other powers, and it dominated the world economy. The Allied occupational authorities pursued a policy of Allied plans for German industry after World War II, industrial disarmament in Western Germany from 1945 to 1948.. Due to international trade interdependencies, this policy led to an economic stagnation in Europe and delayed European recovery from the war for several years.. At the Bretton Woods Conference in July 1944, the Allied nations drew up an economic framework for the post-war world. The agreement created the International Monetary Fund (IMF) and the International Bank for Reconstruction and Development (IBRD), which later became part of the World Bank Group. The Bretton Woods system lasted until 1973. Recovery began with the mid-1948 Deutsche Mark, currency reform in Western Germany, and was sped up by the liberalisation of European economic policy that the US Marshall Plan economic aid (1948–1951) both directly and indirectly caused.. The post-1948 West German recovery has been called the Wirtschaftswunder#West Germany, German economic miracle. Italy also experienced an Italian economic miracle, economic boom and the Trente Glorieuses, French economy rebounded. By contrast, the United Kingdom was in a state of economic ruin, and although receiving a quarter of the total Marshall Plan assistance, more than any other European country, it continued in relative economic decline for decades. The Soviet Union, despite enormous human and material losses, also experienced rapid increase in production in the immediate post-war era,. having seized and transferred most of Germany's industrial plants and exacted World War II reparations, war reparations from its satellite states. Japan recovered much later. China returned to its pre-war industrial production by 1952.


Impact


Casualties and war crimes

Estimates for the total number of casualties in the war vary, because many deaths went unrecorded. Most suggest 60 million people died, about Battle casualties of World War II, 20 million military personnel and 40 million civilians. The Soviet Union alone lost around 27 million people during the war, including 8.7 million military and 19 million civilian deaths.. A quarter of the total people in the Soviet Union were wounded or killed. Germany sustained 5.3 million military losses, mostly on the Eastern Front and during the final battles in Germany.. An estimated 11 to 17 million. civilians died as a direct or as an indirect result of Hitler's Racial policy of Nazi Germany, racist policies, including mass killing of the Holocaust, around 6million Jews, along with Romani Holocaust, Roma, Persecution of homosexuals in Nazi Germany, homosexuals, at least 1.9 million ethnic World War II casualties of Poland, Poles and World War II casualties of the Soviet Union, millions of other Slavs (including Russians, Ukrainians and Belarusians), and Holocaust victims, other ethnic and minority groups. Between 1941 and 1945, more than 200,000 ethnic Serbs, along with Roma and Jews, were Genocide of Serbs in the Independent State of Croatia, persecuted and murdered by the Axis-aligned Croatian Ustaše in
Yugoslavia , common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p ...
. Concurrently, Bosniaks, Muslims and Croats were Chetnik war crimes in World War II, persecuted and killed by Serb nationalist Chetniks, with an estimated 50,000–68,000 victims (of which 41,000 were civilians). Also, more than 100,000 Poles were massacred by the Ukrainian Insurgent Army in the Massacres of Poles in Volhynia and Eastern Galicia, Volhynia massacres, between 1943 and 1945. At the same time, about 10,000–15,000 Ukrainians were killed by the Polish Home Army and other Polish units, in reprisal attacks. In Asia and the Pacific, the number of people killed by Japanese troops remains contested. According to R.J. Rummel, the Japanese killed between 3million and more than 10 million people, with the most probable case of almost 6,000,000 people. According to the British historian M. R. D. Foot, civilian deaths are between 10 million and 20 million, whereas Chinese military casualties (killed and wounded) are estimated to be over five million. Other estimates say that up to 30 million people, most of them civilians, were killed. The most infamous Japanese atrocity was the
Nanjing Massacre The Nanjing Massacre, or the Rape of Nanjing (formerly Chinese postal romanization, romanized as ''Nanking'') was the mass murder of Chinese civilians, noncombatants, and surrendered prisoners of war by the Imperial Japanese Army in Nanji ...
, in which fifty to three hundred thousand Chinese civilians were raped and murdered. Mitsuyoshi Himeta reported that 2.7 million casualties occurred during the Three Alls policy. General Yasuji Okamura implemented the policy in Hebei and Shandong. Axis forces employed Biological warfare, biological and Chemical warfare, chemical weapons. The Imperial Japanese Army used a variety of such weapons during its Second Sino-Japanese War, invasion and occupation of China (''see Unit 731'') and in Battles of Khalkhin Gol, early conflicts against the Soviets. Both the Germans and the Japanese human experimentation on the Chinese, Japanese tested such weapons against civilians, and sometimes on prisoner of war, prisoners of war. The Soviet Union was responsible for the Katyn massacre of 22,000 Polish officers, and the imprisonment or execution of NKVD prisoner massacres, hundreds of thousands of political prisoners by the NKVD secret police, along with Population transfer in the Soviet Union, mass civilian deportations to Siberia, in the Occupation of the Baltic states, Baltic states and eastern Poland annexed by the Red Army. Soviet soldiers committed mass rapes in occupied territories, especially Soviet occupation zone in Germany, in Germany. The exact number of German women and girls raped by Soviet troops during the war and occupation is uncertain, but historians estimate their numbers are likely in the hundreds of thousands, and possibly as many as two million, while figures for women raped by German soldiers in the Soviet Union go as far as ten million. The mass bombing of cities in Europe and Asia has often been called a war crime, although no Positive law, positive or specific Customary international law, customary international humanitarian law with respect to aerial warfare existed before or during World War II. The USAAF Air raids on Japan, bombed a total of 67 Japanese cities, killing 393,000 civilians, including the atomic bombings of Hiroshima and Nagasaki, and destroying 65% of built-up areas.


Genocide, concentration camps, and slave labour

Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...
, under the dictatorship of Adolf Hitler, was responsible for murdering about 6million Jews in what is now known as
the Holocaust The Holocaust (), known in Hebrew language, Hebrew as the (), was the genocide of History of the Jews in Europe, European Jews during World War II. From 1941 to 1945, Nazi Germany and Collaboration with Nazi Germany and Fascist Italy ...
. They also murdered an additional 4million others who were deemed "life unworthy of life, unworthy of life" (including the Disability, disabled and Mental disorder, mentally ill, German atrocities committed against Soviet prisoners of war, Soviet prisoners of war, Romani people, Romani, homosexuals, Freemasons, and Jehovah's Witnesses) as part of a program of deliberate extermination, in effect becoming a "Genocide, genocidal state". German atrocities committed against Soviet prisoners of war, Soviet POWs were kept in especially unbearable conditions, and 3.6 million Soviet POWs out of 5.7 million died in Nazi camps during the war.. In addition to Nazi concentration camps, concentration camps, Extermination camp, death camps were created in Nazi Germany to exterminate people on an industrial scale. Nazi Germany extensively used Forced labour under German rule during World War II, forced labourers; about 12 million Ostarbeiter, Europeans from German-occupied countries were abducted and used as a slave work force in German industry, agriculture and war economy. The Soviet Gulag became a ''de facto'' system of deadly camps during 1942–1943, when wartime privation and hunger caused numerous deaths of inmates, including foreign citizens of Poland and Occupation of the Baltic states, other countries occupied in 1939–1940 by the Soviet Union, as well as Axis German prisoners of war in the Soviet Union, POWs. By the end of the war, most Soviet POWs liberated from Nazi camps and many repatriated civilians were detained in special filtration camps where they were subjected to NKVD evaluation, and 226,127 were sent to the Gulag as real or perceived Nazi collaborators. Japanese prisoner-of-war camps, many of which were used as labour camps, also had high death rates. The International Military Tribunal for the Far East found the death rate of Western prisoners was 27 percent (for American POWs, 37 percent), seven times that of POWs under the Germans and Italians. While 37,583 prisoners from the UK, 28,500 from the Netherlands, and 14,473 from the United States were released after the
surrender of Japan The surrender of the Empire of Japan in World War II was Hirohito surrender broadcast, announced by Emperor Hirohito on 15 August and formally Japanese Instrument of Surrender, signed on 2 September 1945, End of World War II in Asia, ending ...
, the number of Chinese released was only 56. At least five million Chinese civilians from northern China and Manchukuo were enslaved between 1935 and 1941 by the East Asia Development Board, or ''Kōain'', for work in mines and war industries. After 1942, the number reached 10 million. In Java, between 4and 10 million ''rōmusha'' (Japanese: "manual labourers"), were forced to work by the Japanese military. About 270,000 of these Javanese labourers were sent to other Japanese-held areas in Southeast Asia, and only 52,000 were repatriated to Java.


Occupation

In Europe, occupation came under two forms. In Western, Northern, and Central Europe (France, Norway, Denmark, the Low Countries, and the Protectorate of Bohemia and Moravia, annexed portions of Czechoslovakia) Germany established economic policies through which it collected roughly 69.5 billion reichsmarks (27.8 billion US dollars) by the end of the war; this figure does not include the Nazi plunder, plunder of industrial products, military equipment, raw materials and other goods. Thus, the income from occupied nations was over 40 percent of the income Germany collected from taxation, a figure which increased to nearly 40 percent of total German income as the war went on.. In the East, the intended gains of ''
Lebensraum (, ) is a German concept of expansionism and Völkisch movement, ''Völkisch'' nationalism, the philosophy and policies of which were common to German politics from the 1890s to the 1940s. First popularized around 1901, '' lso in:' beca ...
'' were never attained as fluctuating front-lines and Soviet scorched earth policies denied resources to the German invaders.. Unlike in the West, the Racial policy of Nazi Germany, Nazi racial policy encouraged extreme brutality against what it considered to be the "Untermensch, inferior people" of Slavic descent; most German advances were thus followed by Generalplan Ost, mass atrocities and war crimes. The Nazis Nazi crimes against the Polish nation, killed an estimated 2.8 million ethnic Poles in addition to Polish-Jewish victims of the Holocaust. Although Resistance during World War II, resistance groups formed in most occupied territories, they did not significantly hamper German operations in either the East or the West until late 1943. In Asia, Japan termed nations under its occupation as being part of the Greater East Asia Co-Prosperity Sphere, essentially a Japanese hegemony which it claimed was for purposes of liberating colonised peoples. Although Japanese forces were sometimes welcomed as liberators from European domination, Japanese war crimes frequently turned local public opinion against them.. During Japan's initial conquest, it captured of oil (~550,000 tonnes) left behind by retreating Allied forces; and by 1943, was able to get production in the Dutch East Indies up to of oil (~6.8 million tonnes), 76 percent of its 1940 output rate.


Home fronts and production

In the 1930s Britain and the United States together controlled almost 75% of world mineral output—essential for projecting military power. In Europe, before the outbreak of the war, the Allies had significant advantages in both population and economics. In 1938, the Western Allies (United Kingdom, France, Poland and the British Dominions) had a 30 percent larger population and a 30 percent higher gross domestic product than the European Axis powers (Germany and Italy); including colonies, the Allies had more than a 5:1 advantage in population and a nearly 2:1 advantage in GDP.. In Asia at the same time, China had roughly six times the population of Japan but only an 89 percent higher GDP; this reduces to three times the population and only a 38 percent higher GDP if Japanese colonies are included. The United States produced about two-thirds of all munitions used by the Allies in World War II, including warships, transports, warplanes, artillery, tanks, trucks, and ammunition. Although the Allies' economic and population advantages were largely mitigated during the initial rapid blitzkrieg attacks of Germany and Japan, they became the decisive factor by 1942, after the United States and Soviet Union joined the Allies and the war evolved into one of Attrition warfare, attrition.. While the Allies' ability to out-produce the Axis was partly due to more access to natural resources, other factors, such as Germany and Japan's reluctance to employ women in the Workforce, labour force, Allied Strategic bombing during World War II, strategic bombing, and Germany's late shift to a war economy contributed significantly. Additionally, neither Germany nor Japan planned to fight a protracted war, and had not equipped themselves to do so. To improve their production, Germany and Japan used millions of Slavery, slave labourers; Forced labour under German rule during World War II, Germany enslaved about 12 million people, mostly from Eastern Europe, while Slavery in Japan, Japan used more than 18 million people in Far East Asia.


Advances in technology and its application

Aircraft were used for Reconnaissance aircraft, reconnaissance, as fighter aircraft, fighters, bombers, and close air support, ground-support, and each role developed considerably. Innovations included airlift (the capability to quickly move limited high-priority supplies, equipment, and personnel);. and
strategic bombing Strategic bombing is a systematically organized and executed military attack from the air which can utilize strategic bombers, long- or medium-range missiles, or nuclear-armed fighter-bomber aircraft to attack targets deemed vital to the enemy' ...
(the bombing of enemy industrial and population centres to destroy the enemy's ability to wage war). Anti-aircraft warfare, Anti-aircraft weaponry also advanced, including defences such as radar and surface-to-air artillery, in particular the introduction of the proximity fuze. The use of the jet aircraft was pioneered and led to jets becoming standard in air forces worldwide. Advances were made in nearly every aspect of naval warfare, most notably with aircraft carriers and submarines. Although Aeronautics, aeronautical warfare had relatively little success at the start of the war, Battle of Taranto, actions at Taranto, Attack on Pearl Harbor, Pearl Harbor, and the Battle of the Coral Sea, Coral Sea established the carrier as the dominant capital ship (in place of the battleship).. In the Atlantic, escort carriers became a vital part of Allied convoys, increasing the effective protection radius and helping to close the Mid-Atlantic gap. Carriers were also more economical than battleships due to the relatively low cost of aircraft and because they are not required to be as heavily armoured. Submarines, which had proved to be an effective weapon during the World War I, First World War,. were expected by all combatants to be important in the second. The British focused development on Anti-submarine warfare, anti-submarine anti-submarine weapon, weaponry and tactics, such as sonar and convoys, while Germany focused on improving its offensive capability, with designs such as the Type VII submarine and Wolfpack (naval tactic), wolfpack tactics.. Gradually, improving Allied technologies such as the Leigh Light, Hedgehog (weapon), Hedgehog, Squid (weapon), Squid, and Mark 24 mine, homing torpedoes proved effective against German submarines. Land warfare changed from the static frontlines of trench warfare of World War I, which had relied on improved artillery that outmatched the speed of both infantry and cavalry, to increased mobility and combined arms. The tank, which had been used predominantly for infantry support in the First World War, had evolved into the primary weapon.. In the late 1930s, tank design was considerably more advanced than it had been during World WarI, and Tanks in World War II, advances continued throughout the war with increases in speed, armour and firepower. At the start of the war, most commanders thought enemy tanks should be met by tanks with superior specifications.. This idea was challenged by the poor performance of the relatively light early tank guns against armour, and German doctrine of avoiding tank-versus-tank combat. This, along with Germany's use of combined arms, were among the key elements of their highly successful blitzkrieg tactics across Poland and France. Many means of Anti-tank warfare, destroying tanks, including Indirect fire, indirect artillery, anti-tank guns (both towed and Self-propelled artillery, self-propelled), Anti-tank mine, mines, short-ranged infantry antitank weapons, and other tanks were used. Even with large-scale mechanisation, infantry remained the backbone of all forces,. and throughout the war, most infantry were equipped similarly to World War I.. The portable machine gun spread, a notable example being the German MG 34, and various submachine guns which were suited to close combat in urban and jungle settings. The assault rifle, a late war development incorporating many features of the rifle and submachine gun, became the standard post-war infantry weapon for most armed forces. Most major belligerents attempted to solve the problems of complexity and security involved in using large codebooks for cryptography by designing ciphering machines, the most well-known being the German Enigma machine. Development of SIGINT (''sig''nals ''int''elligence) and cryptanalysis enabled the countering process of decryption. Notable examples were the Allied decryption of Japanese naval codes and British Ultra (cryptography), Ultra, a Bombe#The British Bombe, pioneering method for decoding Enigma that benefited from information given to the United Kingdom by the Cipher Bureau (Poland)#Gift to allies, Polish Cipher Bureau, which had been decoding early versions of Enigma before the war. Another component of military intelligence was deception, which the Allies used to great effect in operations such as Operation Mincemeat, Mincemeat and Operation Bodyguard, Bodyguard. Other technological and engineering feats achieved during, or as a result of, the war include the world's first programmable computers (Z3 (computer), Z3, Colossus computer, Colossus, and ENIAC), V-1 flying bomb, guided missiles and V-2 rocket, modern rockets, the Manhattan Project's development of nuclear weapons, operations research, the development of Mulberry harbour, artificial harbours, and Operation Pluto, oil pipelines under the English Channel. Penicillin was first History of penicillin, developed, mass-produced, and used during the war.


See also

* Opposition to World War II * World War III


Notes


References


Sources

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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Further reading

* also se
online review
*


External links


West Point Maps of the European War
.
West Point Maps of the Asian-Pacific War
. * s:Atlas of the World Battle Fronts in Semimonthly Phases to August 15 1945, Atlas of the World Battle Fronts (July 1943 – August 1945) {{Authority control World War II, World wars Conflicts in 1939 Conflicts in 1940 Conflicts in 1941 Conflicts in 1942 Conflicts in 1943 Conflicts in 1944 Conflicts in 1945 Late modern Europe Nuclear warfare Wars involving Albania Wars involving Australia Wars involving Austria Wars involving Belgium Wars involving Bolivia Wars involving Brazil Wars involving British India Wars involving Bulgaria Wars involving Myanmar Wars involving Cambodia Wars involving Canada Wars involving Chile Wars involving Colombia Wars involving Costa Rica Wars involving Croatia Wars involving Cuba Wars involving Czechoslovakia Wars involving Denmark Wars involving the Dominican Republic Wars involving Ecuador Wars involving Egypt Wars involving El Salvador Wars involving Estonia Wars involving Ethiopia Wars involving Finland Wars involving France Wars involving Germany Wars involving Greece Wars involving Guatemala Wars involving Haiti Wars involving Honduras Wars involving Hungary Wars involving Iceland Wars involving Indonesia Wars involving Italy Wars involving Iran Wars involving Iraq Wars involving Japan Wars involving Kazakhstan Wars involving Laos Wars involving Latvia Wars involving Lebanon Wars involving Liberia Wars involving Lithuania Wars involving Luxembourg Wars involving Mexico Wars involving Mongolia Wars involving Montenegro Wars involving Nepal Wars involving Norway Wars involving Nicaragua Wars involving Panama Wars involving Paraguay Wars involving Peru Wars involving Poland Wars involving Rhodesia Wars involving Romania Wars involving Saudi Arabia Wars involving Serbia Wars involving Slovakia Wars involving Slovenia Wars involving South Africa Wars involving Sri Lanka Wars involving Syria Wars involving Thailand Wars involving the Netherlands Wars involving the Philippines Wars involving the Republic of China Wars involving the Soviet Union Wars involving the United Kingdom Wars involving the United States Wars involving Uruguay Wars involving Venezuela Wars involving Vietnam Wars involving Yugoslavia Wars involving India Wars involving New Zealand