
The Pacific Ocean theater of
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
was a major
theater
Theatre or theater is a collaborative form of performing art that uses live performers, usually actors to present experiences of a real or imagined event before a live audience in a specific place, often a stage. The performers may communi ...
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 ...
, the war between the Allies and the
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 ...
. It included the U.S.
Pacific Ocean Areas (command). which included most of the Pacific Ocean and its islands.
The
Philippines
The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...
, 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 ...
,
Borneo
Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...
,
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
, most of the
Territory of New Guinea, and the western part of the
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 ...
were under a different Allied command.
History
On March 30, 1942, US
Admiral
Admiral is one of the highest ranks in many navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force. Admiral is ranked above vice admiral and below admiral of ...
Chester Nimitz was appointed Commander-in-Chief,
Pacific Ocean Areas. In the other major theater in the Pacific region, known as the
South West Pacific theater, Allied forces were commanded by US
General
A general officer is an Officer (armed forces), officer of high rank in the army, armies, and in some nations' air force, air and space forces, marines or naval infantry.
In some usages, the term "general officer" refers to a rank above colone ...
Douglas MacArthur
Douglas MacArthur (26 January 18805 April 1964) was an American general who served as a top commander during World War II and the Korean War, achieving the rank of General of the Army (United States), General of the Army. He served with dis ...
. Both Nimitz and MacArthur were overseen by the US
Joint Chiefs, and indirectly by the British-American
Combined Chiefs of Staff.
Most Japanese forces in the theater were part of the of 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 ...
(IJN), which was responsible for all Japanese warships,
naval aircraft, and
marine infantry units. The ''Rengō Kantai'' was led by Admiral
Isoroku Yamamoto
was a Marshal Admiral of the Imperial Japanese Navy (IJN) and the commander-in-chief of the Combined Fleet during World War II. He commanded the fleet from 1939 until his death in 1943, overseeing the start of the Pacific War in 1941 and J ...
, until he was killed in an
attack by U.S. fighter planes in April 1943. Yamamoto was succeeded by Admiral
Mineichi Koga (1943–44) and Admiral
Soemu Toyoda (1944–45). The of the
Imperial Japanese Army
The Imperial Japanese Army (IJA; , ''Dai-Nippon Teikoku Rikugun'', "Army of the Greater Japanese Empire") was the principal ground force of the Empire of Japan from 1871 to 1945. It played a central role in Japan’s rapid modernization during th ...
(IJA) was responsible for Imperial Japanese Army ground and air units 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 ...
and the South Pacific. The IJN and IJA did not formally use joint/combined staff at the operational level, and their command structures/geographical areas of operations overlapped with each other and those of the Allies.
In the Pacific Ocean theater, Japanese forces fought primarily against 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 ...
, the
U.S. Army, which had 6 Corps and 21 Divisions, and the
U.S. Marine Corps, which had only 6 Divisions. 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 ...
(
British Pacific Fleet),
New Zealand
New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...
, Australia,
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
, and other Allied nations, also contributed forces.
Major campaigns and battles
* Pacific theater
**
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 ...
7 December 1941
**
Battle of Wake Island
The Battle of Wake Island was a battle of the Pacific Ocean theater of World War II, Pacific campaign of World War II, fought on Wake Island. The assault began simultaneously with the attack on Pearl Harbor naval and air bases in Hawaii on the ...
7–23 December 1941
**
Philippines campaign 8 December 1941 – 8 May 1942
***
Battle of Bataan
***
Battle of Corregidor
The Battle of Corregidor (; ), fought on 5–6 May 1942, was the culmination of the Empire of Japan, Japanese Philippines campaign (1941–1942), campaign for the conquest of the Commonwealth of the Philippines during World War II.
The Bat ...
**
Battle of Ambon
**
Battle of Timor
**
Battle of Rabaul
**
Battle of the Java Sea
**
Bombing of Darwin
The Bombing of Darwin, also known as the Battle of Darwin, on 19 February 1942 was the largest single attack ever mounted by a foreign power on Australia. On that day, 242 Empire of Japan, Japanese aircraft, in two separate raids, attacked the ...
**
Battle of the Coral Sea 4–8 May 1942
**
Doolittle Raid 18 April 1942
**
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 ...
4–7 June 1942
**
Guadalcanal campaign
The Guadalcanal campaign, also known as the Battle of Guadalcanal and codenamed Operation Watchtower by the United States, was an Allies of World War II, Allied offensive against forces of the Empire of Japan in the Solomon Islands during th ...
7 August 1942 to 9 February 1943
***
Battle of Savo Island
***
Battle of Cape Esperance
***
Second Naval Battle of Guadalcanal
***
Battle of Tassafaronga
**
New Guinea campaign
The New Guinea campaign of the Pacific War lasted from January 1942 until the end of the war in August 1945. During the initial phase in early 1942, the Empire of Japan invaded the Territory of New Guinea on 23 January and Territory of Papua on ...
**
Solomon Islands Campaign
The Solomon Islands campaign was a major military campaign, campaign of the Pacific War during World War II. The campaign began with the Empire of Japan, Japanese seizure of several areas in the British Solomon Islands and Bougainville Island, B ...
**
Battle of the Bismark Sea
**
Gilbert and Marshall Islands campaign
The Gilbert and Marshall Islands campaign was a series of engagements fought from August 1942 to February 1944, in the Pacific War, Pacific theatre of World War II between the United States and Empire of Japan, Japan. They were the first battl ...
1943–44
***
Makin Island raid 17–18 August 1942
***
Battle of Tarawa 20 November 1943
***
Battle of Makin
A battle is an occurrence of combat in warfare between opposing military units of any number or size. A war usually consists of multiple battles. In general, a battle is a military engagement that is well defined in duration, area, and force ...
20–23 November 1943
***
Battle of Kwajalein 14 February 1944
***
Battle of Eniwetok 17 February 1944
**
Attack on Truk Island 17–18 February 1944
**
Mariana and Palau Islands campaign
The Mariana and Palau Islands campaign, also known as Campaign Plan Granite II, was an offensive launched by the United States against Imperial Japanese forces in the Pacific between June and November 1944 during the Pacific War. The campaig ...
1944
***
Battle of Saipan 15 June 1944
***
Battle of the Philippine Sea 19–21 June 1944
***
Battle of Guam 21 July 1944
***
Battle of Tinian 24 July 1944
***
Battle of Peleliu 15 September 1944
***
Battle of Angaur
The Battle of Angaur was a major battle of the Pacific War, Pacific campaign in World War II, fought on the island of Angaur in the Palau Islands from 17 September to 22 October 1944. This battle was part of a larger offensive campaign known a ...
17 September 1944
***
Battle of Leyte 17 October 1944
***
Battle of Luzon 9 January 1945
**
Battle of Iwo Jima
The was a major battle in which the United States Marine Corps (USMC) and United States Navy (USN) landed on and eventually captured the island of Iwo Jima from the Imperial Japanese Army (IJA) during World War II. The American invasion, desi ...
19 February 1945
**
Battle of Okinawa
The , codenamed Operation Iceberg, was a major battle of the Pacific War fought on the island of Okinawa Island, Okinawa by United States Army and United States Marine Corps forces against the Imperial Japanese Army during the Pacific War, Impe ...
1 April 1945
* North Pacific theater
**
Aleutian Islands Campaign 1942–43
**
Battle of the Komandorski Islands 26 March 1943
References
Bibliography
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{{Authority control
Theaters of World War II
Military history of Japan during World War II
World War 2