Eastern Front (World War II)

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.[9] 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.[10] 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.[11]

The Nazi leadership, including Heinrich Himmler,[12] 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).[13] 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".[14] The vast majority of German soldiers viewed the war in Nazi terms, seeing the Soviet enemy as sub-human.[15]

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.[16] In addition, the Nazis also sought to wipe out the large Jewish population of Central and Eastern Europe[17] as part of their program aiming to exterminate all European Jews.[18]

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."[19] 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.

Semyon Timoshenko and Georgy Zhukov in 1940

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.[20]

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[21] Second Spanish Republic;[22] 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.[23] 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.[24] Fascist Italy joined the Pact a year later.[22][25] The Soviet Union negotiated treaties of mutual assistance with France and with Czechoslovakia with the aim of containing Germany's expansion.[26] 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,[27] a policy advocated by the Soviet ministry of foreign affairs under Maxim Litvinov.[28][29] 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,[30] led to the Molotov–Ribbentrop Pact between the Soviet Union and Germany in late August 1939.[31] 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.

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.

Among other goods, Lend-Lease supplied:[50]^: 8–9

• 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)[51]
• 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.)[52]

Lend-Lease aid of military hardware, components and goods to the Soviet Union constituted to 20% percent of the assistance.[50]^: 122 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.[50]^: 122 In addition, the USSR received wartime innovations including penicillin, radar, rocket, precision-bombing technology, the long-range navigation system Loran, and many other innovations.[50]^: 123

Of the 800,000 tons of nonferrous metals shipped,[50]^: 124 about 350,000 tons were aluminium.[50]^: 135 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.[50]^: 135 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.[50]^: 135

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.[50]^: 129 The massive transfer of equipment and skilled personnel from occupied territories helped further to boost the economic base.[50]^: 129 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.[50]^: 129

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.[50]^: 123 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.[50]^: 122–3

The total Lend-Lease aid provided during the Second World War had been estimated between $42–50 billion.[50]^: 128 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.[50]^: 123 However, post-war negotiations to settle all the debt were never concluded,[50]^: 133 and as of date, the debt issues is still on in future American-Russian summits and talks.[50]^: 133–4

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."[50]^: 123

Europe at the height of German military expansion, 1942

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.[53] Norway lost 20% of its national income in 1940 and 40% in 1943.[54] 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.[55]

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.[56] 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.[57]

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'.[58]

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.[59] 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.[60] Counting deaths and turnover, about 15 million men and women were forced labourers at one point during the war.[61] 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.[62]

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.[60] 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.[63]

Operation Barbarossa: the German invasion of the Soviet Union, 21 June 1941 to 5 December 1941:

  to 9 July 1941

  to 1 September 1941

  to 9 September 1941

  to 5 December 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.[65] 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?"[66]

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.[67] On the same day, the Baltic, Western and Kiev Special military districts were renamed the Northwestern, Western and Southwestern Fronts respectively.[65]

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.[68] 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.[69][70]

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, 650 km (400 mi) 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.[71]

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",[71] 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.[72]

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.[71] 400,000 Soviet prisoners were captured as Kiev was surrendered on 19 September.[71]

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

Soviet children during a German air raid in the first days of the war, June 1941, by RIA Novosti archive

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.[73] As a part of this policy, the NKVD massacred thousands of anti-Soviet prisoners.[74]

Wehrmacht soldiers pulling a car from the mud during the rasputitsa period, November 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.[75] Army Group North positioned itself in front of Leningrad and attempted to cut the rail link at Mga to the east.[76] 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.[77]

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.[78][79]

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 30 km (19 mi) 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.[80]

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,[81] as well as some well-trained Far-Eastern divisions transferred from the east following intelligence that Japan would remain neutral.[82]

The Soviet winter counter-offensive, 5 December 1941 to 7 May 1942:

  Soviet gains

  German gains

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..."[83]

German soldiers surrendering to the Red Army units near Vitovka village, 1941

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.[83]^: 53

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.[83]^: 58–59

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."[83]^: 59–62

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."[83]^: 64

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 100 km (62 mi) 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.

Operation Blue: German advances from 7 May 1942 to 18 November 1942:

  to 7 July 1942

  to 22 July 1942

  to 1 August 1942

  to 18 November 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. At the end of August Romanian mountain troops joined the Caucasian spearhead, while the Romanian 3rd and 4th armies were redeployed from their successful task of clearing the Azov littoral. They took up position on either side of Stalingrad to free German troops for the main offensive. Mindful of the continuing antagonism between Axis allies Romania and Hungary over Transylvania, the Romanian army in the Don bend was separated from the Hungarian 2nd army by the Italian 8th Army. Thus, all of Hitler's allies were involved – including a Slovakian contingent with the 1st Panzer Army and a Croatian regiment attached to 6th Army.

The advance into the Caucasus bogged down, with the Germans unable to fight their way past Malgobek and to the main prize of Grozny. Instead, they switched the direction of their advance to approach it from the south, crossing the Malka at the end of October and entering North Ossetia and entered the suburbs of Ordzhonikidze on 2 November.

Soviet advances on the Eastern Front, 18 November 1942 to March 1943:

  to 12 December 1942

  to 18 February 1943

  to March 1943 (Soviet gains only)

While the German 6th and 4th Panzer Armies had been fighting their way into Stalingrad, Soviet armies had congregated on either side of the city, specifically into the Don bridgeheads, and it was from these that they struck in November 1942. Operation Uranus started on 19 November. Two Soviet fronts punched through the Romanian lines and converged at Kalach on 23 November, trapping 300,000 Axis troops behind them.[84] A simultaneous offensive on the Rzhev sector known as Operation Mars was supposed to advance to Smolensk, but was a costly failure, with German tactical defences preventing any breakthrough.

A Soviet junior political officer (Politruk) urges Soviet troops forward against German positions (12 July 1942).

German infantry and a supporting StuG III assault gun during the advance towards Stalingrad, September 1942

The Germans rushed to transfer troops to the Soviet Union in a desperate attempt to relieve Stalingrad, but the offensive could not get going until 12 December, by which time the 6th Army in Stalingrad was starving and too weak to break out towards it. Operation Winter Storm, with three transferred panzer divisions, got going briskly from Kotelnikovo towards the Aksai river but became bogged down 65 km (40 mi) short of its goal. To divert the rescue attempt, the Red Army decided to smash the Italians and come down behind the relief attempt if they could; that operation starting on 16 December. What it did accomplish was to destroy many of the aircraft that had been transporting relief supplies to Stalingrad. The fairly limited scope of the Soviet offensive, although still eventually targeted on Rostov, also allowed Hitler time to see sense and pull Army Group A out of the Caucasus and back over the Don.[85]

On 31 January 1943, the 90,000 survivors of the 300,000-man 6th Army surrendered. By that time the Hungarian 2nd Army had also been wiped out. The Red Army advanced from the Don 500 km (310 mi) to the west of Stalingrad, marching through Kursk (retaken on 8 February 1943) and Kharkov (retaken 16 February 1943). To save the position in the south, the Germans decided to abandon the Rzhev salient in February, freeing enough troops to make a successful riposte in eastern Ukraine. Manstein's counteroffensive, strengthened by a specially trained SS Panzer Corps equipped with Tiger tanks, opened on 20 February 1943 and fought its way from Poltava back into Kharkov in the third week of March, when the spring thaw intervened. This left a glaring Soviet bulge (salient) in the front centered on Kursk.

German advances at Kharkov and Kursk, 19 February 1943 to 1 August 1943:

  to 18 March 1943

  to 1 August 1943

After the failure of the attempt to capture Stalingrad, Hitler had delegated planning authority for the upcoming campaign season to the German Army High Command and reinstated Heinz Guderian to a prominent role, this time as Inspector of Panzer Troops. Debate among the General Staff was polarised, with even Hitler nervous about any attempt to pinch off the Kursk salient. He knew that in the intervening six months the Soviet position at Kursk had been reinforced heavily with anti-tank guns, tank traps, landmines, barbed wire, trenches, pillboxes, artillery and mortars.[86]

However, if one last great blitzkrieg offensive could be mounted, then attention could then be turned to the Allied threat to the Western Front. Certainly, the peace negotiations in April had gone nowhere.[86] The advance would be executed from the Orel salient to the north of Kursk and from Belgorod to the south. Both wings would converge on the area east of Kursk, and by that means restore the lines of Army Group South to the exact points that it held over the winter of 1941–1942.

Soviet soldiers pushing a 45 mm (1.8 in) anti-tank gun on the road, 1 August 1943

In the north, the entire German 9th Army had been redeployed from the Rzhev salient into the Orel salient and was to advance from Maloarkhangelsk to Kursk. But its forces could not even get past the first objective at Olkhovatka, just 8 km (5.0 mi) into the advance. The 9th Army blunted its spearhead against the Soviet minefields, frustratingly so considering that the high ground there was the only natural barrier between them and flat tank country all the way to Kursk. The direction of advance was then switched to Ponyri, to the west of Olkhovatka, but the 9th Army could not break through here either and went over to the defensive. The Red Army then launched a counter-offensive, Operation Kutuzov.

On 12 July the Red Army battled through the demarcation line between the 211th and 293rd divisions on the Zhizdra River and steamed towards Karachev, right behind them and behind Orel. The southern offensive, spearheaded by 4th Panzer Army, led by Gen. Col. Hoth, with three Tank Corps made more headway. Advancing on either side of the upper Donets on a narrow corridor, the II SS Panzer Corps and the Großdeutschland Panzergrenadier divisions battled their way through minefields and over comparatively high ground towards Oboyan. Stiff resistance caused a change of direction from east to west of the front, but the tanks got 25 km (16 mi) before encountering the reserves of the Soviet 5th Guards Tank Army outside Prokhorovka. Battle was joined on 12 July, with about one thousand tanks being engaged.

The Battle of Prokhorovka was one of the largest tank battles ever fought. It was part of the wider Battle of Kursk.

After the war, the battle near Prochorovka was idealised by Soviet historians as the largest tank battle of all time. The meeting engagement at Prochorovka was a Soviet defensive success, albeit at heavy cost. The Soviet 5th Guards Tank Army, with about 800 light and medium tanks, attacked elements of the II SS Panzer Corps. Tank losses on both sides have been the source of controversy ever since. Although the 5th Guards Tank Army did not attain its objectives, the German advance had been halted.

At the end of the day both sides had fought each other to a standstill, but regardless of the German failure in the north Erich von Manstein proposed he continue the attack with the 4th Panzer Army. The Red Army started the strong offensive operation in the northern Orel salient and achieved a breakthrough on the flank of the German 9th Army. Also worried by the Allies' landing in Sicily on 10 July, Hitler made the decision to halt the offensive even as the German 9th Army was rapidly giving ground in the north. The Germans' final strategic offensive in the Soviet Union ended with their defence against a major Soviet counteroffensive that lasted into August.

The Kursk offensive was the last on the scale of 1940 and 1941 that the Wehrmacht was able to launch; subsequent offensives would represent only a shadow of previous German offensive might.

Loading a Soviet "Katyusha" rocket launcher

The Soviet multi-stage summer offensive started with the advance into the Orel salient. The diversion of the well-equipped Großdeutschland Division from Belgorod to Karachev could not counteract it, and the Wehrmacht began a withdrawal from Orel (retaken by the Red Army on 5 August 1943), falling back to the Hagen line in front of Bryansk. To the south, the Red Army broke through Army Group South's Belgorod positions and headed for Kharkov once again. Although intense battles of movement throughout late July and into August 1943 saw the Tigers blunting Soviet tank attacks on one axis, they were soon outflanked on another line to the west as the Soviet forces advanced down the Psel, and Kharkov was abandoned for the final time on 22 August.

The German forces on the Mius, now comprising the 1st Panzer Army and a reconstituted 6th Army, were by August too weak to repulse a Soviet attack on their own front, and when the Red Army hit them they retreated all the way through the Donbas industrial region to the Dnieper, losing half the farmland that Germany had invaded the Soviet Union to exploit. At this time Hitler agreed to a general withdrawal to the Dnieper line, along which was meant to be the Ostwall, a line of defence similar to the Westwall (Siegfried Line) of fortifications along the German frontier in the west.

The main problem for the Wehrmacht was that these defences had not yet been built; by the time Army Group South had evacuated eastern Ukraine and begun withdrawing across the Dnieper during September, the Soviet forces were hard behind them. Tenaciously, small units paddled their way across the 3 km (1.9 mi) wide river and established bridgeheads. A second attempt by the Red Army to gain land using parachutists, mounted at Kaniv on 24 September, proved as disappointing as at Dorogobuzh eighteen months previously. The paratroopers were soon repelled – but not until still more Red Army troops had used the cover they provided to get themselves over the Dnieper and securely dug in.

As September ended and October started, the Germans found the Dnieper line impossible to hold as the Soviet bridgeheads grew. Important Dnieper towns started to fall, with Zaporozhye the first to go, followed by Dnepropetrovsk. Finally, early in November the Red Army broke out of its bridgeheads on either side of Kiev and captured the Ukrainian capital, at that time the third largest city in the Soviet Union.

130 kilometres (80 mi) west of Kiev, the 4th Panzer Army, still convinced that the Red Army was a spent force, was able to mount a successful riposte at Zhytomyr during the middle of November, weakening the Soviet bridgehead by a daring outflanking strike mounted by the SS Panzer Corps along the river Teterev. This battle also enabled Army Group South to recapture Korosten and gain some time to rest. However, on Christmas Eve the retreat began anew when the First Ukrainian Front (renamed from the Voronezh Front) struck them in the same place. The Soviet advance continued along the railway line until the 1939 Polish–Soviet border was reached on 3 January 1944.

Roza Shanina was a graduate of the Central Women's Sniper Training School. About 800,000 women served in the Soviet Armed Forces during the war.[87]

To the south, the Second Ukrainian Front (ex Steppe Front) had crossed the Dnieper at Kremenchug and continued westwards. In the second week of January 1944 they swung north, meeting Vatutin's tank forces which had swung south from their penetration into Poland and surrounding ten German divisions at Korsun–Shevchenkovsky, west of Cherkassy. Hitler's insistence on holding the Dnieper line, even when facing the prospect of catastrophic defeat, was compounded by his conviction that the Cherkassy pocket could break out and even advance to Kiev, but Manstein was more concerned about being able to advance to the edge of the pocket and then implore the surrounded forces to break out.

By 16 February the first stage was complete, with panzers separated from the contracting Cherkassy pocket only by the swollen Gniloy Tikich river. Under shellfire and pursued by Soviet tanks, the surrounded German troops, among whom were the 5th SS Panzer Division Wiking, fought their way across the river to safety, although at the cost of half their number and all their equipment. They assumed the Red Army would not attack again, with the spring approaching, but on 3 March the Soviet Ukrainian Front went over to the offensive. Having already isolated the Crimea by severing the Perekop isthmus, Malinovsky's forces advanced across the mud to the Romanian border, not stopping on the river Prut.

Soviet advances from 1 August 1943 to 31 December 1944:

  to 1 December 1943

  to 30 April 1944

  to 19 August 1944

  to 31 December 1944

One final move in the south completed the 1943–44 campaigning season, which had wrapped up a Soviet advance of over 800 kilometres (500 mi). In March, 20 German divisions of Generaloberst Hans-Valentin Hube's 1st Panzer Army were encircled in what was to be known as Hube's Pocket near Kamenets-Podolskiy. After two weeks' of heavy fighting, the 1st Panzer managed to escape the pocket, at the cost of losing almost the entire heavy equipment. At this point, Hitler sacked several prominent generals, Manstein included. In April, the Red Army took back Odessa, followed by 4th Ukrainian Front's campaign to restore control over the Crimea, which culminated in the capture of Sevastopol on 10 May.

Along Army Group Centre's front, August 1943 saw this force pushed back from the Hagen line slowly, ceding comparatively little territory, but the loss of Bryansk, and more importantly Smolensk, on 25 September cost the Wehrmacht the keystone of the entire German defensive system. The 4th and 9th armies and 3rd Panzer Army still held their own east of the upper Dnieper, stifling Soviet attempts to reach Vitebsk. On Army Group North's front, there was barely any fighting at all until January 1944, when out of nowhere Volkhov and Second Baltic Fronts struck.[88]

In a lightning campaign, the Germans were pushed back from Leningrad and Novgorod was captured by Soviet forces. After a 120-kilometre (75 mi) advance in January and February, the Leningrad Front had reached the borders of Estonia. To Stalin, the Baltic Sea seemed the quickest way to take the battles to the German territory in East Prussia and seize control of Finland.[88] The Leningrad Front's offensives towards Tallinn, a main Baltic port, were stopped in February 1944. The German army group "Narwa" included Estonian conscripts, defending the re-establishment of Estonian independence.[89][90]

Soviet and Polish Armia Krajowa soldiers in Vilnius, July 1944

The Red Army is greeted in Bucharest, Romania, August 1944.

Wehrmacht planners were convinced that the Red Army would attack again in the south, where the front was 80 kilometres (50 mi) from Lviv and offered the most direct route to Berlin. Accordingly, they stripped troops from Army Group Centre, whose front still protruded deep into the Soviet Union. The Germans had transferred some units to France to counter the invasion of Normandy two weeks before. The Belorussian Offensive (codenamed Operation Bagration), which was agreed upon by Allies at the Tehran Conference in December 1943 and launched on 22 June 1944, was a massive Soviet attack, consisting of four Soviet army groups totalling over 120 divisions that smashed into a thinly held German line.

They focused their massive attacks on Army Group Centre, not Army Group North Ukraine as the Germans had originally expected. More than 2.3 million Soviet troops went into action against German Army Group Centre, which had a strength of fewer than 800,000 men. At the points of attack, the numerical and quality advantages of the Soviet forces were overwhelming. The Red Army achieved a ratio of ten to one in tanks and seven to one in aircraft over their enemy. The Germans crumbled. The capital of Belarus, Minsk, was taken on 3 July, trapping some 100,000 Germans. Ten days later the Red Army reached the prewar Polish border. Bagration was, by any measure, one of the largest single operations of the war.

By the end of August 1944, it had cost the Germans ~400,000 dead, wounded, missing and sick, from whom 160,000 were captured, as well as 2,000 tanks and 57,000 other vehicles. In the operation, the Red Army lost ~180,000 dead and missing (765,815 in total, including wounded and sick plus 5,073 Poles),[91] as well as 2,957 tanks and assault guns. The offensive at Estonia claimed another 480,000 Soviet soldiers, 100,000 of them classed as dead.[92][93]

The neighbouring Lvov–Sandomierz operation was launched on 17 July 1944, with the Red Army routing the German forces in Western Ukraine and retaking Lviv. The Soviet advance in the south continued into Romania and, following a coup against the Axis-allied government of Romania on 23 August, the Red Army occupied Bucharest on 31 August. Romania and the Soviet Union signed an armistice on 12 September.[94][95]

Soviet soldiers advance through the streets of Jelgava, Latvia, mid-1944.

The rapid progress of Operation Bagration threatened to cut off and isolate the German units of Army Group North bitterly resisting the Soviet advance towards Tallinn. Despite a ferocious attack at the Sinimäed Hills, Estonia, the Soviet Leningrad Front failed to break through the defence of the smaller, well-fortified army detachment "Narwa" in terrain not suitable for large-scale operations.[96][97]

On the Karelian Isthmus, the Red Army launched a Vyborg–Petrozavodsk Offensive against the Finnish lines on 9 June 1944 (coordinated with the Western Allied Invasion of Normandy). Three armies were pitted there against the Finns, among them several experienced guards rifle formations. The attack breached the Finnish front line of defence in Valkeasaari on 10 June and the Finnish forces retreated to their secondary defence line, the VT-line. The Soviet attack was supported by a heavy artillery barrage, air bombardments and armoured forces. The VT-line was breached on 14 June and after a failed counterattack in Kuuterselkä by the Finnish armoured division, the Finnish defence had to be pulled back to the VKT-line. After heavy fighting in the battles of Tali-Ihantala and Ilomantsi, Finnish troops finally managed to halt the Soviet attack.

In Poland, as the Red Army approached, the Polish Home Army (AK) launched Operation Tempest. During the Warsaw Uprising, the Red Army were ordered to halt at the Vistula River. Whether Stalin was unable or unwilling to come to the aid of the Polish resistance is disputed.[98]

In Slovakia, the Slovak National Uprising started as an armed struggle between German Wehrmacht forces and rebel Slovak troops between August and October 1944. It was centered at Banská Bystrica.

On 8 September 1944 the Red Army began an attack on the Dukla Pass on the Slovak–Polish border. Two months later, the Soviet forces won the battle and entered Slovakia. The toll was high: 20,000 Red Army soldiers died, plus several thousand Germans, Slovaks and Czechs.

Under the pressure of the Soviet Baltic Offensive, the German Army Group North were withdrawn to fight in the sieges of Saaremaa, Courland and Memel.

Soviet advances from 1 January 1945 to 11 May 1945:

  to 30 March 1945

  to 11 May 1945

The Soviet Union finally entered Warsaw on 17 January 1945, after the city was destroyed and abandoned by the Germans. Over three days, on a broad front incorporating four army fronts, the Red Army launched the Vistula–Oder Offensive across the Narew River and from Warsaw. The Soviets outnumbered the Germans on average by 5–6:1 in troops, 6:1 in artillery, 6:1 in tanks and 4:1 in self-propelled artillery. After four days the Red Army broke out and started moving thirty to forty kilometres a day, taking the Baltic states, Danzig, East Prussia, Poznań, and drawing up on a line sixty kilometres east of Berlin along the River Oder. During the full course of the Vistula–Oder operation (23 days), the Red Army forces sustained 194,191 total casualties (killed, wounded and missing) and lost 1,267 tanks and assault guns.

On 25 January 1945, Hitler renamed three army groups. Army Group North became Army Group Courland; Army Group Centre became Army Group North and Army Group A became Army Group Centre. Army Group North (old Army Group Centre) was driven into an ever-smaller pocket around Königsberg in East Prussia.

German refugees from East Prussia, February 1945

A limited counter-attack (codenamed Operation Solstice) by the newly created Army Group Vistula, under the command of Reichsführer-SS Heinrich Himmler, had failed by 24 February, and the Red Army drove on to Pomerania and cleared the right bank of the Oder River. In the south, the German attempts, in Operation Konrad, to relieve the encircled garrison at Budapest failed and the city fell on 13 February. On 6 March, the Germans launched what would be their final major offensive of the war, Operation Spring Awakening, which failed by 16 March. On 30 March the Red Army entered Austria and captured Vienna on 13 April.

OKW claim German losses of 77,000 killed, 334,000 wounded and 192,000 missing, with a total of 603,000 men, on the Eastern Front during January and February 1945.[99]

On 9 April 1945, Königsberg in East Prussia finally fell to the Red Army, although the shattered remnants of Army Group Centre continued to resist on the Vistula Spit and Hel Peninsula until the end of the war in Europe. The East Prussian operation, though often overshadowed by the Vistula–Oder operation and the later battle for Berlin, was in fact one of the largest and costliest operations fought by the Red Army throughout the war. During the period it lasted (13 January – 25 April), it cost the Red Army 584,788 casualties, and 3,525 tanks and assault guns.

The fall of Königsberg allowed Stavka to free up General Konstantin Rokossovsky's 2nd Belorussian Front (2BF) to move west to the east bank of the Oder. During the first two weeks of April, the Red Army performed their fastest front redeployment of the war. General Georgy Zhukov concentrated his 1st Belorussian Front (1BF), which had been deployed along the Oder river from Frankfurt in the south to the Baltic, into an area in front of the Seelow Heights. The 2BF moved into the positions being vacated by the 1BF north of the Seelow Heights. While this redeployment was in progress, gaps were left in the lines and the remnants of the German 2nd Army, which had been bottled up in a pocket near Danzig, managed to escape across the Oder. To the south General Ivan Konev shifted the main weight of the 1st Ukrainian Front (1UF) out of Upper Silesia north-west to the Neisse River.[100] The three Soviet fronts had altogether some 2.5 million men (including 78,556 soldiers of the 1st Polish Army); 6,250 tanks; 7,500 aircraft; 41,600 artillery pieces and mortars; 3,255 truck-mounted Katyusha rocket launchers, (nicknamed "Stalin Organs"); and 95,383 motor vehicles, many of which were manufactured in the United States.[100]

14,933,000 Soviet and Soviet-allied personnel were awarded the Medal for Victory over Germany.

A flag of the Soviet 150th Rifle Division raised over the Reichstag (the Victory Banner)

The Soviet offensive had two objectives. Because of Stalin's suspicions about the intentions of the Western Allies to hand over territory occupied by them in the post-war Soviet sphere of influence, the offensive was to be on a broad front and was to move as rapidly as possible to the west, to meet the Western Allies as far west as possible. But the over-riding objective was to capture Berlin. The two were complementary because possession of the zone could not be won quickly unless Berlin was taken. Another consideration was that Berlin itself held strategic assets, including Adolf Hitler and part of the German atomic bomb program.[101]

The offensive to capture central Germany and Berlin started on 16 April with an assault on the German front lines on the Oder and Neisse rivers. After several days of heavy fighting the Soviet 1BF and 1UF punched holes through the German front line and were fanning out across central Germany. By 24 April, elements of the 1BF and 1UF had completed the encirclement of the German capital and the Battle of Berlin entered its final stages. On 25 April the 2BF broke through the German 3rd Panzer Army's line south of Stettin. They were now free to move west towards the British 21st Army Group and north towards the Baltic port of Stralsund. The 58th Guards Rifle Division of the 5th Guards Army made contact with the US 69th Infantry Division of the First Army near Torgau, Germany at the Elbe river.[102][103]

Soviet soldiers celebrating the surrender of the German forces in Berlin, 2 May 1945

On 29 and 30 April, as the Soviet forces fought their way into the centre of Berlin, Adolf Hitler married Eva Braun and then committed suicide by taking cyanide and shooting himself. In his will, Hitler appointed Grand Admiral Karl Dönitz as new President of the Reich and Propaganda Minister Joseph Goebbels as new Chancellor of the Reich; however, Goebbels also committed suicide, along with his wife Magda and their children, on 1 May 1945. Helmuth Weidling, defence commandant of Berlin, surrendered the city to the Soviet forces on 2 May.[104] Altogether, the Berlin operation (16 April – 2 May) cost the Red Army 361,367 casualties (dead, wounded, missing and sick) and 1,997 tanks and assault guns. German losses in this period of the war remain impossible to determine with any reliability.[105]

Upon learning of Hitler and Goebbels's death, Dönitz (now President of the Reich) appointed Johann Ludwig Schwerin von Krosigk as new "Leading Minister" of the German Reich.[106] Rapidly advancing Allied forces limited the jurisdiction of the new German government to an area around Flensburg near the Danish border, where Dönitz's headquarters were located, along with Mürwik. Accordingly, this administration was referred to as the Flensburg government.[107] Dönitz and Schwerin von Krosigk attempted to negotiate an armistice with the Western Allies while continuing to resist the Soviet Army, but were eventually forced to accept an unconditional surrender on all fronts.[108]

At 2:41 am on 7 May 1945, at SHAEF headquarters, German Chief-of-Staff General Alfred Jodl signed the unconditional surrender documents for all German forces to the Allies at Reims in France. It included the phrase All forces under German control to cease active operations at 2301 hours Central European time on 8 May 1945. The next day shortly before midnight, Field Marshal Wilhelm Keitel repeated the signing in Berlin at Zhukov's headquarters, now known as the German-Russian Museum. The war in Europe was over.[109]

In the Soviet Union the end of the war is considered to be 9 May, when the surrender took effect Moscow time. This date is celebrated as a national holiday – Victory Day – in Russia (as part of a two-day 8–9 May holiday) and some other post-Soviet countries. The ceremonial Victory parade was held in Moscow on 24 June.

The German Army Group Centre initially refused to surrender and continued to fight in Czechoslovakia until about 11 May.[110] A small German garrison on the Danish island of Bornholm refused to surrender until they were bombed and invaded by the Soviets. The island was returned to the Danish government four months later.

The final battle of the Second World War on the Eastern Front, the Battle of Slivice, broke out on 11 May and ended in a Soviet victory on the 12th.

On 13 May 1945, all Soviet offensives ceased and the fighting on the Eastern Front of World War II came to an end.

After the German defeat, Joseph Stalin promised his allies Truman and Churchill that he would attack the Japanese within 90 days of the German surrender. The Soviet invasion of Manchuria began on 8 August 1945, with an assault on the Japanese puppet states of Manchukuo and neighbouring Mengjiang; the greater offensive would eventually include northern Korea, southern Sakhalin, and the Kuril Islands. Apart from the Battles of Khalkhin Gol, it marked the only military action of the Soviet Union against Imperial Japan; at the Yalta Conference, it had agreed to Allied pleas to terminate the neutrality pact with Japan and enter the Second World War's Pacific theatre within three months after the end of the war in Europe. While not a part of the Eastern Front operations, it is included here because the commanders and much of the forces used by the Red Army came from the European Theatre of operations and benefited from the experience gained there. In many ways this was a 'perfect' operation, delivered with the skill gained during the bitter fighting with the Wehrmacht and Luftwaffe over four years.[111]

Adolf Hitler led Germany during World War II.

Adolf Hitler exercised tight control over the German war-effort, spending much of his time in his command bunkers (most notably at Rastenburg in East Prussia, at Vinnitsa in Ukraine, and under the garden of the Reich Chancellery in Berlin). At crucial periods in the war he held daily situation-conferences at which he used his remarkable talent for public speaking to overwhelm opposition from his generals and from the OKW staff with rhetoric.

In part because of the unexpected degree of German success in the Battle of France (despite the warnings of the professional military) Hitler believed himself a military genius, with a grasp of the total war-effort that eluded his generals. In August 1941, when Walther von Brauchitsch (commander-in-chief of the Wehrmacht) and Fedor von Bock appealed for an attack on Moscow, Hitler instead ordered the encirclement and capture of Ukraine, in order to acquire the farmland, industry, and natural resources of that country. Some historians like Bevin Alexander in How Hitler Could Have Won regard this decision as a missed opportunity to win the war.

In the winter of 1941–1942 Hitler believed that his obstinate refusal to allow the German armies to retreat had saved Army Group Centre from collapse. He later told Erhard Milch:

Hitler with generals Friedrich Paulus, Adolf Heusinger and Fedor von Bock in Poltava, German-occupied Ukraine, June 1942

I had to act ruthlessly. I had to send even my closest generals packing, two army generals, for example … I could only tell these gentlemen, "Get yourself back to Germany as rapidly as you can – but leave the army in my charge. And the army is staying at the front."

The success of this hedgehog defence outside Moscow led Hitler to insist on the holding of territory when it made no military sense, and to sack generals who retreated without orders. Officers with initiative were replaced with yes-men or with fanatical Nazis. The disastrous encirclements later in the war – at Stalingrad, Korsun and many other places – resulted directly from Hitler's orders. This idea of holding territory led to another failed plan, dubbed "Heaven-bound Missions", which involved fortifying even the most unimportant or insignificant of cities and the holding of these "fortresses" at all costs. Many divisions became cut off in "fortress" cities, or wasted uselessly in secondary theatres, because Hitler would not sanction retreat or voluntarily abandon any of his conquests.

Frustration at Hitler's leadership in the war was one of the factors in the attempted coup d'etat of 1944, but after the failure of the 20 July Plot Hitler considered the army and its officer corps suspect and came to rely on the Schutzstaffel (SS) and Nazi party members to prosecute the war.

Hitler's direction of the war ultimately proved disastrous for the German Army, though the skill, loyalty, professionalism and endurance of officers and soldiers enabled him to keep Germany fighting to the end. F. W. Winterbotham wrote of Hitler's signal to Gerd von Rundstedt to continue the attack to the west during the Battle of the Bulge:

From experience we had learned that when Hitler started refusing to do what the generals recommended, things started to go wrong, and this was to be no exception.

Joseph Stalin led the Soviet Union during World War II.

Joseph Stalin bore the greatest responsibility for some of the disasters at the beginning of the war (for example, the Battle of Kiev (1941)), but equally deserves praise for the subsequent success of the Soviet Red Army, which depended on the unprecedentedly rapid industrialisation of the Soviet Union, which Stalin's internal policy had made the first priority throughout the 1930s. Stalin's Great Purge of the Red Army in the late 1930s involved the legal prosecution of many of the senior command, many of whom the courts convicted and sentenced to death or to imprisonment.

The executed included Mikhail Tukhachevsky, a proponent of armoured blitzkrieg. Stalin promoted some obscurantists like Grigory Kulik who opposed the mechanisation of the army and the production of tanks, but on the other hand purged the older commanders who had held their positions since the Russian Civil War of 1917–1922, and who had experience, but were deemed "politically unreliable". This opened up their places to the promotion of many younger officers that Stalin and the NKVD regarded as in line with Stalinist politics. Many of these newly promoted commanders proved terribly inexperienced, but some later became very successful. Soviet tank-output remained the largest in the world.

From the foundation of the Red Army in 1918, political distrust of the military had led to a system of "dual command", with every commander paired with a political commissar, a member of the Communist Party of the Soviet Union. Larger units had military councils consisting of the commander, commissar and chief of staff – commissars ensured the loyalty of the commanding officers and implemented Party orders.

Following the Soviet occupation of eastern Poland, of the Baltic states and of Bessarabia and Northern Bukovina in 1939–1940, Stalin insisted on the occupation of every fold of the newly Sovietized territories; this move westward positioned troops far from their depots, in salients that left them vulnerable to encirclement. As tension heightened in spring, 1941, Stalin desperately tried not to give Hitler any provocation that Berlin could use as an excuse for a German attack; Stalin refused to allow the military to go on the alert – even as German troops gathered on the borders and German reconnaissance planes overflew installations. This refusal to take necessary action was instrumental in the destruction of major portions of the Red Air Force, lined up on its airfields, in the first days of the German-Soviet war.

At the crisis of the war, in the autumn of 1942, Stalin made many concessions to the army: the government restored unitary command by removing the Commissars from the chain of command. Order 25 of 15 January 1943 introduced shoulderboards for all ranks; this represented a significant symbolic step, since after the Russian Revolution of 1917 shoulderboards had connotations as a symbol of the old Tsarist régime. Beginning in autumn 1941, units that had proved themselves by superior performance in combat were given the traditional "Guards" title.[119]

These concessions were combined with ruthless discipline: Order No. 227, issued on 28 July 1942, threatened commanders who retreated without orders with punishment by court-martial. Infractions by military and politruks were punished with transferral to penal battalions and to penal companies which carried out especially hazardous duties, such as serving as tramplers to clear Nazi minefields.[120] The order stipulated to capture or shoot "cowards" and fleeing panicked troops at the rear the blocking detachments in the first three months shot 1,000 penal troops and sent 24,993 to penal battalions.[121] By October 1942 the idea of regular blocking detachments was quietly dropped, By 29 October 1944 the units were officially disbanded.[122][123]

As it became clear that the Soviet Union would win the war, Stalin ensured that propaganda always mentioned his leadership of the war; he sidelined the victorious generals and never allowed them to develop into political rivals. After the war the Soviets once again purged the Red Army (though not as brutally as in the 1930s) and demoted many successful officers (including Zhukov, Malinovsky and Koniev) to unimportant positions.

• Glantz, David; House, Jonathan (1995). When Titans Clashed: How the Red Army stopped Hitler. Lawrence, Kansas: University Press of Kansas. ISBN 0-7006-0899-0.

• "Operation Typhoon": Video on YouTube, lecture by David Stahel, author of Operation Typhoon. Hitler's March on Moscow (2013) and The Battle for Moscow (2015); via the official channel of USS Silversides Museum.
• "Fighting a Lost War: The German Army in 1943": Video on YouTube, lecture by Robert Citino, via the official channel of the U.S. Army Heritage and Education Center.
• "Kursk, The Epic Armored Engagement": Video on YouTube, via the official channel of The National WWII Museum; session by the Robert Citino and Jonathan Parshall at the 2013 International Conference on World War II.
• "Mindset of WWII German Soldiers": Video on YouTube—interview with the historian Sönke Neitzel discussing his book Soldaten: On Fighting, Killing and Dying, via the official channel of The Agenda, a programme of TVOntario, a Canadian public television station.
• "How the Red Army Defeated Germany: The Three Alibis": Video on YouTube—lecture by Jonathan M. House of the U.S. Army Command and General Staff College, via the official channel of Dole Institute of Politics.