Great Patriotic War

The Eastern Front of World War II was a theatre of conflict between the European Axis powers against the Soviet Union (USSR), Poland and other Allies, which encompassed Central Europe, Eastern Europe, Northeast Europe (Baltics), and Southeast Europe (Balkans) from 22 June 1941 to 9 May 1945. It was known as the Great Patriotic War in the Soviet Union – and still is in some of its successor states, while almost everywhere else it has been called the ''Eastern Front''. In present-day German and Ukrainian historiography the name German-Soviet War is typically used.

The battles on the Eastern Front of the Second World War constituted the largest military confrontation in history. They were characterised by unprecedented ferocity and brutality, wholesale destruction, mass deportations, and immense loss of life due to combat, starvation, exposure, disease, and massacres. Of the estimated 70–85 million deaths attributed to World War II, around 30 million occurred on the Eastern Front, including 9 million children. The Eastern Front was decisive in determining the outcome in the European theatre of operations in World War II, eventually serving as the main reason for the defeat of Nazi Germany and the Axis nations.

The two principal belligerent powers were Germany and the Soviet Union, along with their respective allies. Though never sending in ground troops to the Eastern Front, the United States and the United Kingdom both provided substantial material aid to the Soviet Union in the form of the Lend-Lease program along with naval and air support. The joint German–Finnish operations across the northernmost Finnish–Soviet border and in the Murmansk region are considered part of the Eastern Front. In addition, the Soviet–Finnish Continuation War is generally also considered the northern flank of the Eastern Front.

Background

Germany and the Soviet Union remained unsatisfied with the outcome of World War I (1914–1918). Soviet Russia had lost substantial territory in Eastern Europe as a result of the Treaty of Brest-Litovsk (March 1918), where the Bolsheviks in Petrograd conceded to German demands and ceded control of Poland, Lithuania, Estonia, Latvia, Finland, and other areas, to the Central Powers. Subsequently, when Germany in its turn surrendered to the Allies (November 1918) and these territories became independent states under the terms of the Paris Peace Conference of 1919 at Versailles, Soviet Russia was in the midst of a civil war and the Allies did not recognise the Bolshevik government, so no Soviet Russian representation attended.

Adolf Hitler had declared his intention to invade the Soviet Union on 11 August 1939 to Carl Jacob Burckhardt, League of Nations Commissioner, by saying:

Everything I undertake is directed against the Russians. If the West is too stupid and blind to grasp this, then I shall be compelled to come to an agreement with the Russians, beat the West and then after their defeat turn against the Soviet Union with all my forces. I need the Ukraine so that they can't starve us out, as happened in the last war.

The Molotov–Ribbentrop Pact signed in August 1939 was a non-aggression agreement between Germany and the Soviet Union. It contained a secret protocol aiming to return Central Europe to the pre–World War I ''status quo'' by dividing it between Germany and the Soviet Union. Finland, Estonia, Latvia and Lithuania would return to the Soviet control, while Poland and Romania would be divided. The Eastern Front was also made possible by the German–Soviet Border and Commercial Agreement in which the Soviet Union gave Germany the resources necessary to launch military operations in Eastern Europe.

On 1 September 1939 Germany invaded Poland, starting World War II. On 17 September, the Soviet Union invaded Eastern Poland, and, as a result, Poland was partitioned among Germany, the Soviet Union and Lithuania. Soon after that, the Soviet Union demanded significant territorial concessions from Finland, and after Finland rejected Soviet demands, the Soviet Union attacked Finland on 30 November 1939 in what became known as the Winter War – a bitter conflict that resulted in a peace treaty on 13 March 1940, with Finland maintaining its independence but losing its eastern parts in Karelia.

In June 1940 the Soviet Union occupied and illegally annexed the three Baltic states (Estonia, Latvia and Lithuania). The Molotov–Ribbentrop Pact ostensibly provided security to the Soviets in the occupation both of the Baltics and of the north and northeastern regions of Romania (Northern Bukovina and Bessarabia, June–July 1940), although Hitler, in announcing the invasion of the Soviet Union, cited the Soviet annexations of Baltic and Romanian territory as having violated Germany's understanding of the pact. Moscow partitioned the annexed Romanian territory between the Ukrainian and Moldavian Soviet republics.

Ideologies

German ideology

Adolf Hitler had argued in his autobiography '' Mein Kampf'' (1925) for the necessity of ''Lebensraum'' ("living space"): acquiring new territory for Germans in Eastern Europe, in particular Russia. He envisaged settling Germans there, as according to Nazi ideology the Germanic people constituted the "master race", while exterminating or deporting most of the existing inhabitants to Siberia and using the remainder as slave labour.
Hitler as early as 1917 had referred to the Russians as inferior, believing that the Bolshevik Revolution had put the Jews in power over the mass of Slavs, who were, in Hitler's opinion, incapable of ruling themselves and had thus ended up being ruled by Jewish masters.

The Nazi leadership, including Heinrich Himmler, saw the war against the Soviet Union as a struggle between the ideologies of Nazism and Jewish Bolshevism, and ensuring territorial expansion for the Germanic ''Übermensch'' (superhumans), who according to Nazi ideology were the Aryan '' Herrenvolk'' ("master race"), at the expense of the Slavic ''Untermenschen'' (subhumans). Wehrmacht officers told their troops to target people who were described as "Jewish Bolshevik subhumans", the "Mongol hordes", the "Asiatic flood" and the "red beast". The vast majority of German soldiers viewed the war in Nazi terms, seeing the Soviet enemy as sub-human.

Hitler referred to the war in radical terms, calling it a "war of annihilation" (''Vernichtungskrieg'') which was both an ideological and racial war. The Nazi vision for the future of Eastern Europe was codified most clearly in the ''Generalplan Ost''. The populations of occupied Central Europe and the Soviet Union were to be partially deported to West Siberia, enslaved and eventually exterminated; the conquered territories were to be colonised by German or "Germanized" settlers. In addition, the Nazis also sought to wipe out the large Jewish population of Central and Eastern Europe
as part of their program aiming to exterminate all European Jews.

After Germany's initial success at the Battle of Kiev in 1941, Hitler saw the Soviet Union as militarily weak and ripe for immediate conquest. In a speech at the Berlin Sportpalast on 3 October, he announced, "We have only to kick in the door and the whole rotten structure will come crashing down." Thus, Germany expected another short '' Blitzkrieg'' and made no serious preparations for prolonged warfare. However, following the decisive Soviet victory at the Battle of Stalingrad in 1943 and the resulting dire German military situation, Nazi propaganda began to portray the war as a German defence of Western civilisation against destruction by the vast "Bolshevik hordes" that were pouring into Europe.

Soviet situation

Throughout the 1930s the Soviet Union underwent massive industrialisation and economic growth under the leadership of Joseph Stalin. Stalin's central tenet, "Socialism in One Country", manifested itself as a series of nationwide centralised five-year plans from 1929 onwards. This represented an ideological shift in Soviet policy, away from its commitment to the international communist revolution, and eventually leading to the dissolution of the Comintern (Third International) organisation in 1943. The Soviet Union started a process of militarisation with the first five-year plan that officially began in 1928, although it was only towards the end of the second five-year plan in the mid-1930s that military power became the primary focus of Soviet industrialisation.

In February 1936 the Spanish general election brought many communist leaders into the Popular Front government in the Second Spanish Republic, but in a matter of months a right-wing military coup initiated the Spanish Civil War of 1936–1939. This conflict soon took on the characteristics of a proxy war involving the Soviet Union and left wing volunteers from different countries on the side of the predominantly socialist and communist-led Second Spanish Republic; while Nazi Germany, Fascist Italy, and Portugal's Estado Novo took the side of Spanish Nationalists, the military rebel group led by General Francisco Franco. It served as a useful testing ground for both the Wehrmacht and the Red Army to experiment with equipment and tactics that they would later employ on a wider scale in the Second World War.

Nazi Germany, which was an anti-communist régime, formalised its ideological position on 25 November 1936 by signing the Anti-Comintern Pact with Imperial Japan. Fascist Italy joined the Pact a year later. The Soviet Union negotiated treaties of mutual assistance with France and with Czechoslovakia with the aim of containing Germany's expansion. The German ''Anschluss'' of Austria in 1938 and the dismemberment of Czechoslovakia (1938–1939) demonstrated the impossibility of establishing a collective security system in Europe, a policy advocated by the Soviet ministry of foreign affairs under Maxim Litvinov. This, as well as the reluctance of the British and French governments to sign a full-scale anti-German political and military alliance with the USSR, led to the Molotov–Ribbentrop Pact between the Soviet Union and Germany in late August 1939. The separate Tripartite Pact between what became the three prime Axis Powers would not be signed until some four years after the Anti-Comintern Pact.

Forces

The war was fought between Germany, its allies and Finland, against the Soviet Union and its allies. The conflict began on 22 June 1941 with the Operation Barbarossa offensive, when Axis forces crossed the borders described in the German–Soviet Nonaggression Pact, thereby invading the Soviet Union. The war ended on 9 May 1945, when Germany's armed forces surrendered unconditionally following the Battle of Berlin (also known as the Berlin Offensive), a strategic operation executed by the Red Army.

The states that provided forces and other resources for the German war effort included the Axis Powers – primarily Romania, Hungary, Italy, pro-Nazi Slovakia, and Croatia. Anti-Soviet Finland, which had fought the Winter War against the Soviet Union, also joined the offensive. The ''Wehrmacht'' forces were also assisted by anti-Communist partisans in places like Western Ukraine, and the Baltic states. Among the most prominent volunteer army formations was the Spanish Blue Division, sent by Spanish dictator Francisco Franco to keep his ties to the Axis intact.

The Soviet Union offered support to the anti-Axis partisans in many ''Wehrmacht''-occupied countries in Central Europe, notably those in Slovakia and Poland. In addition, the Polish Armed Forces in the East, particularly the First and Second Polish armies, were armed and trained, and would eventually fight alongside the Red Army. The Free French forces also contributed to the Red Army by the formation of the GC3 (''Groupe de Chasse 3'' or 3rd Fighter Group) unit to fulfil the commitment of Charles de Gaulle, leader of the Free French, who thought that it was important for French servicemen to serve on all fronts.

The above figures includes all personnel in the German Army, i.e. active-duty Heer, Waffen SS, Luftwaffe ground forces, personnel of the naval coastal artillery and security units. In the spring of 1940, Germany had mobilised 5,500,000 men. By the time of the invasion of the Soviet Union, the Wehrmacht consisted of c. 3,800,000 men of the Heer, 1,680,000 of the Luftwaffe, 404,000 of the Kriegsmarine, 150,000 of the Waffen-SS, and 1,200,000 of the Replacement Army (contained 450,400 active reservists, 550,000 new recruits and 204,000 in administrative services, vigiles and or in convalescence). The Wehrmacht had a total strength of 7,234,000 men by 1941. For Operation Barbarossa, Germany mobilised 3,300,000 troops of the Heer, 150,000 of the Waffen-SS and approximately 250,000 personnel of the Luftwaffe were actively earmarked.

By July 1943, the Wehrmacht numbered 6,815,000 troops. Of these, 3,900,000 were deployed in eastern Europe, 180,000 in Finland, 315,000 in Norway, 110,000 in Denmark, 1,370,000 in western Europe, 330,000 in Italy, and 610,000 in the Balkans. According to a presentation by Alfred Jodl, the Wehrmacht was up to 7,849,000 personnel in April 1944. 3,878,000 were deployed in eastern Europe, 311,000 in Norway/Denmark, 1,873,000 in western Europe, 961,000 in Italy, and 826,000 in the Balkans. About 15–20% of total German strength were foreign troops (from allied countries or conquered territories). The German high water mark was just before the Battle of Kursk, in early July 1943: 3,403,000 German troops and 650,000 Finnish, Hungarian, Romanian and other countries' troops.

For nearly two years the border was quiet while Germany conquered Denmark, Norway, France, the Low Countries, and the Balkans. Hitler had always intended to renege on his pact with the Soviet Union, eventually making the decision to invade in the spring of 1941.

Some historians say Stalin was fearful of war with Germany, or just did not expect Germany to start a two-front war, and was reluctant to do anything to provoke Hitler. Others say that Stalin was eager for Germany to be at war with capitalist countries. Another viewpoint is that Stalin expected war in 1942 (the time when all his preparations would be complete) and stubbornly refused to believe it would come early.

British historians Alan S. Milward and M. Medlicott show that Nazi Germany—unlike Imperial Germany—was prepared for only a short-term war (Blitzkrieg). According to Edward Ericson, although Germany's own resources were sufficient for the victories in the West in 1940, massive Soviet shipments obtained during a short period of Nazi–Soviet economic collaboration were critical for Germany to launch Operation Barbarossa.

Germany had been assembling very large numbers of troops in eastern Poland and making repeated reconnaissance flights over the border; the Soviet Union responded by assembling its divisions on its western border, although the Soviet mobilisation was slower than Germany's due to the country's less dense road network. As in the Sino-Soviet conflict on the Chinese Eastern Railway or Soviet–Japanese border conflicts, Soviet troops on the western border received a directive, signed by Marshal Semyon Timoshenko and General of the Army Georgy Zhukov, that ordered (as demanded by Stalin): "do not answer to any provocations" and "do not undertake any (offensive) actions without specific orders" – which meant that Soviet troops could open fire only on their soil and forbade counter-attack on German soil. The German invasion therefore caught the Soviet military and civilian leadership largely by surprise.

The extent of warnings received by Stalin about a German invasion is controversial, and the claim that there was a warning that "Germany will attack on 22 June without declaration of war" has been dismissed as a "popular myth". However, some sources quoted in the articles on Soviet spies Richard Sorge and Willi Lehmann, say they had sent warnings of an attack on 20 or 22 June, which were treated as "disinformation". The Lucy spy ring in Switzerland also sent warnings, possibly deriving from Ultra codebreaking in Britain. Sweden had access to internal German communications through breaking the crypto used in the Siemens and Halske T52 crypto machine also known as the Geheimschreiber and informed Stalin about the forthcoming invasion well ahead of June 22, but did not reveal its sources.

Soviet intelligence was fooled by German disinformation, so sent false alarms to Moscow about a German invasion in April, May and the beginning of June. Soviet intelligence reported that Germany would rather invade the USSR after the fall of the British Empire or after an unacceptable ultimatum demanding German occupation of Ukraine during the German invasion of Britain.

Foreign support and measures

A strategic air offensive by the United States Army Air Force and Royal Air Force played a significant part in damaging German industry and tying up German air force and air defence resources, with some bombings, such as the bombing of the eastern German city of Dresden, being done to facilitate specific Soviet operational goals. In addition to Germany, hundreds of thousands of tons of bombs were dropped on their eastern allies of Romania and Hungary, primarily in an attempt to cripple Romanian oil production.

British and Commonwealth forces also contributed directly to the fighting on the Eastern Front through their service in the Arctic convoys and training Red Air Force pilots, as well as in the provision of early material and intelligence support.

Soviet Union

Among other goods, Lend-Lease supplied:
* 58% of the USSR's high octane aviation fuel
* 33% of their motor vehicles
* 53% of USSR domestic production of expended ordnance (artillery shells, mines, assorted explosives)
* 30% of fighters and bombers
* 93% of railway equipment (locomotives, freight cars, wide gauge rails, etc.)
* 50–80% of rolled steel, cable, lead, and aluminium
* 43% of garage facilities (building materials and blueprints)
* 12% of tanks and SPGs
* 50% of TNT (1942–1944) and 33% of ammunition powder (in 1944)
* 16% of all explosives (From 1941 to 1945, the USSR produced 505,000 tons of explosives and received 105,000 tons of Lend-Lease imports.)Ivan Ivanovich Vernidub, Boepripasy pobedy, 1998

Lend-Lease aid of military hardware, components and goods to the Soviet Union constituted to 20% percent of the assistance. The rest were foodstuff, nonferrous metals (e.g., copper, magnesium, nickel, zinc, lead, tin, aluminium), chemical substances, petroleum (high octane aviation gasoline) and factory machinery. The aid of production-line equipment and machinery were crucial and helped to maintain adequate levels of Soviet armament production during the entire war. In addition, the USSR received wartime innovations including penicillin, radar, rocket, precision-bombing technology, the long-range navigation system Loran, and many other innovations.

Of the 800,000 tons of nonferrous metals shipped, about 350,000 tons were aluminium. The shipment of aluminium not only represented double the amount of metal that Germany possessed, but also composed the bulk of aluminium that was used in manufacture of Soviet aircraft, that had fallen in critically short supply. Soviet statistics show, that without these shipments of aluminium, aircraft production would have been less than one-half (or about 45,000 less) of the total 137,000 produced aircraft.

Stalin noted in 1944, that two-thirds of Soviet heavy industry had been built with the help of the United States, and the remaining one-third, with the help from other Western nations such as Great Britain and Canada. The massive transfer of equipment and skilled personnel from occupied territories helped further to boost the economic base. Without Lend-Lease aid, Soviet Union's diminished post invasion economic base would not have produced adequate supplies of weaponry, other than focus on machine tool, foodstuff and consumer goods.

In the last year of war, Lend-Lease data show that about 5.1 million tons of foodstuff left the United States for the Soviet Union. It is estimated that all the food supplies sent to Russia could feed a 12,000,000-man strong army a half pound of concentrated food per day, for the entire duration of the war.

The total Lend-Lease aid provided during the Second World War had been estimated between $42–50 billion. The Soviet Union received shipments in war materials, military equipment and other supplies worth of $12.5 billion, about a quarter of the American Lend-Lease aid provided to other Allied countries. However, post-war negotiations to settle all the debt were never concluded, and as of date, the debt issues is still on in future American-Russian summits and talks.

Prof. Dr. Albert L. Weeks concluded, "As to attempts to sum up the importance of those four-year-long shipments of Lend-Lease for the Russian victory on the Eastern Front in World War II, the jury is still out – that is, in any definitive sense of establishing ''exactly'' how crucial this aid was."

Nazi Germany

Germany's economic, scientific, research and industrial capabilities were among the most technically advanced in the world at the time. However, access to (and control of) the resources, raw materials and production capacity required to entertain long-term goals (such as European control, German territorial expansion and the destruction of the USSR) were limited. Political demands necessitated the expansion of Germany's control of natural and human resources, industrial capacity and farmland beyond its borders (conquered territories). Germany's military production was tied to resources outside its area of control, a dynamic not found amongst the Allies.

During the war, as Germany acquired new territories (either by direct annexation or by installing puppet governments in defeated countries), these new territories were forced to sell raw materials and agricultural products to German buyers at extremely low prices. Overall, France made the largest contribution to the German war effort. Two-thirds of all French trains in 1941 were used to carry goods to Germany. In 1943–44, French payments to Germany may have risen to as much as 55% of French GDP. Norway lost 20% of its national income in 1940 and 40% in 1943. Axis allies such as Romania and Italy, Hungary, Finland, Croatia and Bulgaria benefited from Germany's net imports. Overall, Germany imported 20% of its food and 33% of its raw materials from conquered territories and Axis allies.

On 27 May 1940, Germany signed the "Oil Pact" with Romania, by which Germany would trade arms for oil. Romania's oil production amounted to approximately 6,000,000 tons annually. This production represents 35% of the total fuel production of the Axis, including synthetic products and substitutes, and 70% of the total production of crude oil. In 1941, Germany only had 18% of the oil it had in peacetime. Romania supplied Germany and its allies with roughly 13 million barrels of oil (about 4 million per year) between 1941 and 1943. Germany's peak oil production in 1944 amounted to about 12 million barrels of oil per year.

Rolf Karlbom estimated that Swedish share of Germany's total consumption of iron may have amounted to 43% during the period of 1933–43. It may also be likely that "Swedish ore formed the raw material of four out of every ten German guns" during the Hitler era'.

Forced labour

The use of foreign forced labour and slavery in Germany and throughout German-occupied Europe during World War II took place on an unprecedented scale. It was a vital part of the German economic exploitation of conquered territories. It also contributed to the mass extermination of populations in German-occupied Europe. The Germans abducted approximately 12 million foreign people from almost twenty European countries; about two-thirds came from Central Europe and Eastern Europe.Part1
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. Counting deaths and turnover, about 15 million men and women were forced labourers at one point during the war. For example, 1.5 million French soldiers were kept in POW camps in Germany as hostages and forced workers and, in 1943, 600,000 French civilians were forced to move to Germany to work in war plants.

The defeat of Germany in 1945 freed approximately 11 million foreigners (categorised as "displaced persons"), most of whom were forced labourers and POWs. In wartime, the German forces had brought into the Reich 6.5 million civilians in addition to Soviet POWs for unfree labour in factories. In all, 5.2 million foreign workers and POWs were repatriated to the Soviet Union, 1.6 million to Poland, 1.5 million to France, and 900,000 to Italy, along with 300,000 to 400,000 each to Yugoslavia, Czechoslovakia, the Netherlands, Hungary, and Belgium.

Conduct of operations

While German historians do not apply any specific periodisation to the conduct of operations on the Eastern Front, all Soviet and Russian historians divide the war against Germany and its allies into three periods, which are further subdivided into eight major campaigns of the Theatre of war:
* First period (russian: Первый период Великой Отечественной войны) (22 June 1941 – 18 November 1942)
# Summer–Autumn Campaign of 1941 (russian: Летне-осенняя кампания 1941 г.) (22 June – 4 December 1941)
# Winter Campaign of 1941–42 (russian: Зимняя кампания 1941/42 г.) (5 December 1941 – 30 April 1942)
# Summer–Autumn Campaign of 1942 (russian: Летне-осенняя кампания 1942 г.) (1 May – 18 November 1942)
* Second period (russian: Второй период Великой Отечественной войны) (19 November 1942 – 31 December 1943)
# Winter Campaign of 1942–43 (russian: Зимняя кампания 1942–1943 гг.) (19 November 1942 – 3 March 1943)
# Summer–Autumn Campaign of 1943 (russian: Летне-осенняя кампания 1943 г.) (1 July – 31 December 1943)
* Third period (russian: Третий период Великой Отечественной войны) (1 January 1944 – 9 May 1945)
# Winter–Spring Campaign (russian: Зимне-весенняя кампания 1944 г.) (1 January – 31 May 1944)
# Summer–Autumn Campaign of 1944 (russian: Летне-осенняя кампания 1944 г.) (1 June – 31 December 1944)
# Campaign in Europe during 1945 (russian: Кампания в Европе 1945 г.) (1 January – 8 May 1945)

Operation Barbarossa: Summer 1941

Operation Barbarossa began just before dawn on 22 June 1941. The Germans cut the wire network in all Soviet western military districts to undermine the Red Army's communications. Panicky transmissions from the Soviet front-line units to their command headquarters were picked up like this: "We are being fired upon. What shall we do?" The answer was just as confusing: "You must be insane. And why is your signal not in code?"

At 03:15 on 22 June 1941, 99 of 190 German divisions, including fourteen panzer divisions and ten motorised, were deployed against the Soviet Union from the Baltic to the Black Sea. They were accompanied by ten Romanian divisions, three Italian divisions, two Slovakian divisions and nine Romanian and four Hungarian brigades. On the same day, the Baltic, Western and Kiev Special military districts were renamed the Northwestern, Western and Southwestern Fronts respectively.

To establish air supremacy, the ''Luftwaffe'' began immediate attacks on Soviet airfields, destroying much of the forward-deployed Soviet Air Force airfield fleets consisting of largely obsolescent types before their pilots had a chance to leave the ground. For a month the offensive conducted on three axes was completely unstoppable as the panzer forces encircled hundreds of thousands of Soviet troops in huge pockets that were then reduced by slower-moving infantry armies while the panzers continued the offensive, following the '' Blitzkrieg'' doctrine.

Army Group North's objective was Leningrad via the Baltic states. Comprising the 16th and 18th Armies and the 4th Panzer Group, this formation advanced through the Baltic states, and the Russian Pskov and Novgorod regions. Local insurgents seized the moment and controlled most of Lithuania, northern Latvia and southern Estonia prior to the arrival of the German forces.

Army Group Centre's two panzer groups (the 2nd and 3rd), advanced to the north and south of Brest-Litovsk and converged east of Minsk, followed by the 2nd, 4th, and 9th Armies. The combined panzer force reached the Beresina River in just six days, from their start lines. The next objective was to cross the Dnieper river, which was accomplished by 11 July. Their next target was Smolensk, which fell on 16 July, but the fierce Soviet resistance in the Smolensk area and slowing of the ''Wehrmacht'' advance by the North and South Army Groups forced Hitler to halt a central thrust at Moscow and to divert the 3rd Panzer Group north. Critically, Guderian's 2nd Panzer Group was ordered to move south in a giant pincer manoeuvre with Army Group South which was advancing into Ukraine. Army Group Centre's infantry divisions were left relatively unsupported by armour to continue their slow advance to Moscow.

This decision caused a severe leadership crisis. The German field commanders argued for an immediate offensive towards Moscow, but Hitler over-ruled them, citing the importance of Ukrainian agricultural, mining and industrial resources, as well as the massing of Soviet reserves in the Gomel area between Army Group Centre's southern flank and the bogged-down Army Group South's northern flank. This decision, Hitler's "summer pause", is believed to have had a severe impact on the outcome of the Battle of Moscow later in the year, by slowing down the advance on Moscow in favour of encircling large numbers of Soviet troops around Kiev.

Army Group South, with the 1st Panzer Group, the 6th, 11th and 17th Armies, was tasked with advancing through Galicia and into Ukraine. Their progress, however, was rather slow, and they took heavy casualties in the Battle of Brody. At the beginning of July, the Third and Fourth Romanian Armies, aided by elements of the German 11th Army, fought their way through Bessarabia towards Odessa. The 1st Panzer Group turned away from Kiev for the moment, advancing into the Dnieper bend (western Dnipropetrovsk Oblast). When it joined up with the southern elements of Army Group South at Uman, the Group captured about 100,000 Soviet prisoners in a huge encirclement. Advancing armoured divisions of Army Group South met with Guderian's 2nd Panzer Group near Lokhvytsa in 16 September, cutting off large numbers of Red Army troops in the pocket east of Kiev. 400,000 Soviet prisoners were captured as Kiev was surrendered on 19 September.

On 26 September, the Soviet forces east of Kiev surrendered and the Battle of Kiev ended.

As the Red Army withdrew behind the Dnieper and Dvina rivers, the Soviet Stavka (high command) turned its attention to evacuating as much of the western regions' industry as it could. Factories were dismantled and transported on flatcars away from the front line for re-establishment in more remote areas of the Ural Mountains, Caucasus, Central Asia and south-eastern Siberia. Most civilians were left to make their own way east, with only industry-related workers evacuated with the equipment; much of the population was left behind to the mercy of the invading forces.

Stalin ordered the retreating Red Army to initiate a scorched-earth policy to deny the Germans and their allies basic supplies as they advanced eastward. To carry out that order, destruction battalions were formed in front-line areas, having the authority to summarily execute any suspicious person. The destruction battalions burned down villages, schools, and public buildings. As a part of this policy, the NKVD massacred thousands of anti-Soviet prisoners.

Leningrad, Moscow and Rostov: Autumn 1941

Hitler then decided to resume the advance on Moscow, re-designating the panzer groups as panzer armies for the occasion. Operation Typhoon, which was set in motion on 30 September, saw the 2nd Panzer Army rush along the paved road from Oryol (captured 5 October) to the Oka River at Plavsk, while the 4th Panzer Army (transferred from Army Group North to Centre) and 3rd Panzer armies surrounded the Soviet forces in two huge pockets at Vyazma and Bryansk. Army Group North positioned itself in front of Leningrad and attempted to cut the rail link at Mga to the east. This began the 900-day Siege of Leningrad. North of the Arctic Circle, a German–Finnish force set out for Murmansk but could get no further than the Zapadnaya Litsa River, where they settled down.

Army Group South pushed down from the Dnieper to the Sea of Azov coast, also advancing through Kharkov, Kursk, and Stalino. The combined German and Romanian forces moved into the Crimea and took control of all of the peninsula by autumn (except Sevastopol, which held out until 3 July 1942). On 21 November, the Wehrmacht took Rostov, the gateway to the Caucasus. However, the German lines were over-extended and the Soviet defenders counterattacked the 1st Panzer Army's spearhead from the north, forcing them to pull out of the city and behind the Mius River; the first significant German withdrawal of the war.

The onset of the winter freeze saw one last German lunge that opened on 15 November, when the Wehrmacht attempted to encircle Moscow. On 27 November, the 4th Panzer Army got to within of the Kremlin when it reached the last tramstop of the Moscow line at Khimki. Meanwhile, the 2nd Panzer Army failed to take Tula, the last Soviet city that stood in its way to the capital. After a meeting held in Orsha between the head of the ''OKH'' ( Army General Staff), General Franz Halder and the heads of three Army groups and armies, decided to push forward to Moscow since it was better, as argued by the head of Army Group Center, Field Marshal Fedor von Bock, for them to try their luck on the battlefield rather than just sit and wait while their opponent gathered more strength.

However, by 6 December it became clear that the ''Wehrmacht'' did not have the strength to capture Moscow, and the attack was suspended. Marshal Shaposhnikov thus began his counter-attack, employing freshly mobilised reserves, as well as some well-trained Far-Eastern divisions transferred from the east following intelligence that Japan would remain neutral.

Soviet counter-offensive: Winter 1941

The Soviet counter-offensive during the Battle of Moscow had removed the immediate German threat to the city. According to Zhukov, "the success of the December counter-offensive in the central strategic direction was considerable. Having suffered a major defeat the German striking forces of Army Group Centre were retreating." Stalin's objective in January 1942 was "to deny the Germans any breathing space, to drive them westward without let-up, to make them use up their reserves before spring comes..."

The main blow was to be delivered by a double envelopment orchestrated by the Northwestern Front, the Kalinin Front and the Western Front. The overall objective according to Zhukov was the "subsequent encirclement and destruction of the enemy's main forces in the area of Rzhev, Vyazma and Smolensk. The Leningrad Front, the Volkhov Front and the right wing forces of the Northwestern Front were to rout the Army Group North." The Southwestern Front and Southern Front were to defeat the Army Group South. The Caucasian Front and Black Sea Fleet were to take back the Crimea.

The 20th Army, part of the Soviet 1st Shock Army, the 22nd Tank Brigade and five ski battalions launched their attack on 10 January 1942. By 17 January, the Soviets had captured Lotoshino and Shakhovskaya. By 20 January, the 5th and 33rd Armies had captured Ruza, Dorokhovo, Mozhaisk and Vereya, while the 43rd and 49th Armies were at Domanovo.

The Wehrmacht rallied, retaining a salient at Rzhev. A Soviet parachute drop by two battalions of the 201st Airborne Brigade and the 250th Airborne Regiment on 18 and 22 January was designed to "cut off enemy communications with the rear." Lt.-Gen. Mikhail Grigoryevich Yefremov's 33rd Army aided by Gen. Belov's 1st Cavalry Corps and Soviet partisans attempted to seize Vyazma. This force was joined by additional paratroopers of the 8th Airborne Brigade at the end of January. However, in early February, the Germans managed to cut off this force, separating the Soviets from their main force in the rear of the Germans. They were supplied by air until April when they were given permission to regain the Soviet main lines. Only part of Belov's Cavalry Corps made it to safety however, while Yefremov's men fought "a losing battle."

By April 1942, the Soviet Supreme Command agreed to assume the defensive so as to "consolidate the captured ground." According to Zhukov, ''"During the winter offensive, the forces of the Western Front had advanced from 70 to 100 km, which somewhat improved the overall operational and strategic situation on the Western sector."''

To the north, the Red Army surrounded a German garrison in Demyansk, which held out with air supply for four months, and established themselves in front of Kholm, Velizh, and Velikie Luki.

Further north still, the Soviet 2nd Shock Army was unleashed on the Volkhov River. Initially this made some progress; however, it was unsupported, and by June a German counterattack cut off and destroyed the army. The Soviet commander, Lieutenant General Andrey Vlasov, later defected to Germany and formed the ROA or Russian Liberation Army.

In the south the Red Army lunged over the Donets River at Izyum and drove a deep salient. The intent was to pin Army Group South against the Sea of Azov, but as the winter eased the Wehrmacht counter-attacked and cut off the over-extended Soviet troops in the Second Battle of Kharkov.

Don, Volga, and Caucasus: Summer 1942

Although plans were made to attack Moscow again, on 28 June 1942, the offensive re-opened in a different direction. Army Group South took the initiative, anchoring the front with the Battle of Voronezh and then following the Don river southeastwards. The grand plan was to secure the Don and Volga first and then drive into the Caucasus towards the oil fields, but operational considerations and Hitler's vanity made him order both objectives to be attempted simultaneously. Rostov was recaptured on 24 July when the 1st Panzer Army joined in, and then that group drove south towards Maikop. As part of this, Operation Shamil was executed, a plan whereby a group of Brandenburger commandos dressed up as Soviet NKVD troops to destabilise Maikop's defences and allow the 1st Panzer Army to enter the oil town with little opposition.

Meanwhile, the 6th Army was driving towards Stalingrad, for a long period unsupported by 4th Panzer Army, which had been diverted to help 1st Panzer Army cross the Don. By the time the 4th Panzer Army had rejoined the Stalingrad offensive Soviet resistance (comprising the 62nd Army under Vasily Chuikov) had stiffened. A leap across the Don brought German troops to the Volga on 23 August but for the next three months the ''Wehrmacht'' would be fighting the Battle of Stalingrad street-by-street.

Towards the south, the 1st Panzer Army had reached the Caucasian foothills and the Malka River