What did Germany do when Russia mobilized?

  • Introduction & Top Questions
  • The initial stages of the war

  • The last offensives and the Allies’ victory

July 1914 was the month that changed the world. On 28 June 1914, Archduke Franz Ferdinand was assassinated, and just five weeks later the Great Powers of Europe were at war. But how did it all happen? Historian Gordon Martel, author of The Month That Changed The World: July 1914, is blogging regularly for us over the next few weeks, giving us a week-by-week and day-by-day account of the events that led up to the First World War.


Before the sun rose on Wednesday morning a new hope for a negotiated settlement of the crisis was initiated. The Kaiser, acting on the advice of his chancellor, wrote directly to the Tsar. He hoped that Nicholas would agree with him that they shared a common interest in punishing all of those ‘morally responsible’ for the dastardly murder of the Archduke, and he promised to exert his influence to induce Austria to deal directly with Russia in order to arrive at an understanding.

At 1 a.m. Nicholas appealed to Wilhelm for his assistance: ‘An ignoble war has been declared on a weak country.’ The indignation that this had caused in Russia was enormous and he anticipated that he would soon be overwhelmed by the pressure being brought to bear upon him, forcing him to take ‘extreme measures’ that would lead to war. To avoid this terrible calamity, he begged Wilhelm, in the name of their old friendship, ‘to do what you can to stop your allies from going too far.’

The question of the day on Wednesday was whether Austria-Hungary and Russia might undertake direct discussions to settle the crisis before further military steps turned a local Austro-Serbian war into a general European one.

What did Germany do when Russia mobilized?
The New York Times, 29 July 1914. Public domain via Wikimedia Commons

The German general staff summarized its view of the situation: the crime of Sarajevo had led Austria to resort to extreme measures ‘in order to burn with a glowing iron a cancer that has constantly threatened to poison the body of Europe’. The quarrel would have been limited to Austria and Serbia had not Russia begun making military preparations. Now, if the Austrians advanced into Serbia, they would face not only the Serbian army but the vastly superior strength of Russia. Thus, they could not contemplate fighting Serbia without securing themselves against an attack by Russia. This would force them to mobilize the other half of their army – at which point a collision between Austria and Russia would become inevitable. This would force Germany to mobilize, which would lead Russia and France to do the same – ‘and the mutual butchery of the civilized nations of Europe would begin’.

In other words, unless a negotiated settlement could be reached quickly, war seemed inevitable.

Berchtold pleaded with Berlin that only ‘plain speech’ would restrain the Russians, i.e. only the threat of a German attack would stop them from taking military action against Austria. And there were signs that Russia was wary of war. The Austrian ambassador reported that Sazonov was desperate to avoid a conflict and was ‘clinging to straws in the hope of escaping from the present situation’. Sazonov promised that if they were to negotiate on the basis of Sir Edward Grey’s proposal, Austria’s legitimate demands would be recognized and fully satisfied.

At the same time, Sazonov was pleading for British support: the only way to prevent war now was for Britain to warn the Triple Alliance that it would join its entente partners if war were to break out.

But Grey refused to make any promises. When he met with the French ambassador later that afternoon, he warned him not to assume that Britain would again stand by France as it had in 1905. Then it had appeared that Germany was attempting to crush France; now, ‘the dispute between Austria and Serbia was not one in which we felt called to take a hand’. Earlier that day the British cabinet had decided not to decide; Grey was to inform both sides that Britain was unable to make any promises.

At 4 p.m. the German general staff received intelligence that Belgium was calling up reservists, raising the numbers of the Belgian army from 50,000 to 100,000, equipping its fortifications and reinforcing defences along the frontier. Forty minutes later a meeting at the Neue Palais in Potsdam, the Kaiser and his advisers decided to compose an ultimatum to present to Belgium: either agree to adopt an attitude of ‘benevolent neutrality’ towards Germany in a European war or face dire consequences.

Simultaneously, Bethmann Hollweg decided to launch a bold new initiative. He proposed to the British ambassador that Britain agree to remain neutral in the event of war in exchange for a German promise not to seize any French territory in Europe when it ended. He understood that Britain would not allow France to be crushed, but this was not Germany’s aim. When asked whether his proposal applied to French colonies as well, the chancellor replied that he was unable to give a similar undertaking concerning them. Belgium’s integrity would be respected when the war ended –as long as it had not sided against Germany.

Yet another German initiative was taken in St Petersburg. At 7 p.m. the German ambassador transmitted a warning from the chancellor that if Russia continued with its military preparations Germany would be compelled to mobilize, in which case it would take the offensive. Sazonov replied that this removed any doubts he may have had concerning the real cause of Austria’s intransigence.

The Russians found this confusing, as they had just received another telegram from the Kaiser containing a plea that he should not permit Russian military measures to jeopardize German efforts to promote a direct understanding between Russia and Austria. It was agreed that the Tsar should wire Berlin immediately to ask for an explanation of the apparent discrepancy. At 8.20 p.m. the wire asking for clarification was sent. Trusting in his cousin’s ‘wisdom and friendship’, Tsar Nicholas suggested that the ‘Austro-Serbian problem’ be handed over to the Hague conference.

A message announcing a general mobilization in Russia had been drafted and ready to be sent out by 9 p.m. Then, just minutes before it was to be sent out, a personal messenger from the Tsar arrived, instructing that it the general mobilization be cancelled and a partial one re-instituted. The Tsar wanted to hear how the Kaiser would respond to his latest telegram before proceeding. ‘Everything possible must be done to save the peace. I will not become responsible for a monstrous slaughter’.

Gordon Martel is a leading authority on war, empire, and diplomacy in the modern age. His numerous publications include studies of the origins of the first and second world wars, modern imperialism, and the nature of diplomacy. A founding editor of The International History Review, he has taught at a number of Canadian universities, and has been a visiting professor or fellow in England, Ireland and Australia. Editor-in-chief of the five-volume Encyclopedia of War, he is also joint editor of the longstanding Seminar Studies in History series. His new book is The Month That Changed The World: July 1914.

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In August 1939, as Europe slid towards another world war, Germany and the Soviet Union signed a non-aggression treaty. The Nazi-Soviet Pact came as a complete surprise to other nations, given the ideological differences between the two countries. It ushered in a period of military co-operation which allowed Hitler to ignore western diplomatic moves and invade Poland. Stalin's forces then attacked from the west and completed the subjugation and partition of the Polish state. For the next year and a half Germany also benefitted economically from the arrangement, with Russia exporting grain and oil in return for manufactured goods.

Soviet cooperation allowed Hitler to expand his plans for European domination. In May 1940 the Blitzkrieg rolled westwards and France was conquered in six weeks. But peace with Russia would not last. Hitler had always wanted to see Germany expand eastwards to gain Lebensraum or 'living space' for its people.

After the fall of France Hitler ordered plans to be drawn up for an invasion of the Soviet Union. He intended to destroy what he saw as Stalin's 'Jewish Bolshevist' regime and establish Nazi hegemony. The conquest and enslavement of the Soviet Union's racially 'inferior' Slavic populations would be part of a grand plan of 'Germanisation' and economic exploitation lasting well beyond the expected military victory. Regardless of recent economic and political co-operation, the Soviet Union was regarded as the natural enemy of Nazi Germany and a key strategic objective.

On 18 December 1940 Hitler issued Führer Directive 21, an order for the invasion of the Soviet Union. The German military plan called for an advance up to a hypothetical line running from the port of Archangel in northern Russia to the port of Astrakhan on the Caspian Sea – the so-called 'A-A line'. This would bring the bulk of the Soviet population and its economic potential under German control.

After a five week delay while operations in Greece and Yugoslavia were completed, Operation 'Barbarossa' - named after the all-conquering Medieval Holy Roman Emperor Frederick I - was launched on 22 June 1941. Over three and a half million German and other Axis troops attacked along a 1,800-mile front. A total of 148 divisions - 80 per cent of the German Army - were committed to the enterprise. Seventeen panzer divisions, formed into four Panzer Groups, formed the vanguard with 3,400 tanks. They were supported by 2,700 aircraft of the Luftwaffe. It was the largest invasion force to date.

The German forces were split into three army groups, each with a specific objective. Army Group North was to head through the Baltic States of Latvia, Lithuania and Estonia and take Leningrad. Army Group South would attack into the Ukraine towards Kiev and the Donbas (Donets Basin) industrial region. Between them, Army Group Centre's objective was Minsk, Smolensk and then Moscow itself. Hitler expected these all to be attained in approximately ten weeks.

The Soviets had massed large forces on their western frontier, but they were under orders not to provoke the Germans. Although mistrustful of Hitler, Stalin did not believe that he would attack so soon, despite the ominous German build-up and a stream of intelligence warnings. He had some 5 million men available immediately and a total of 23,000 tanks, but the Red Army was still unprepared when the Germans struck.

The Germans got off to a good start, with the panzer groups quickly pushing towards their objectives and Russian forces falling apart in confusion. They were greatly helped by the Luftwaffe's bombing of Soviet airfields, artillery positions and troop concentrations. The Germans quickly established air superiority. On the first day alone 1,800 Soviet aircraft were destroyed, most of them on the ground. Army Group North, under Field Marshal Wilhelm Ritter von Leeb, plunged towards Leningrad, with General Erich Hoepner's Panzer Group 4 in the lead. Russian forces in this sector were thinly spread and the panzers covered 500 miles (804 km) in three weeks. By mid-July they were only 60 miles (96 km) from their objective.

Army Group Centre, under Field Marshal Fedor von Bock, also made rapid progress. By 28 June Panzer Group 2, led by General Heinz Guderian, and General Hermann Hoth's Panzer Group 3 had encircled three Russian armies and captured over 320,000 men in the Bialystok-Minsk pockets. The two panzer groups then pressed ahead, linking up on the far side of Smolensk on 27 July in another double envelopment. Two more Russian armies were trapped and destroyed, and another 300,000 troops taken prisoner.

Army Group South, under Field Marshal Gerd von Rundstedt, had the furthest to go and his attack also faced the stiffest Soviet resistance. Most of the Russian armour was on this front. But by early July von Rundstedt had pushed out beyond the pre-1939 Polish frontier. General Ewald von Kleist's Panzer Group 1 was slowed by Soviet flanking attacks as it headed for Kiev, the capital of Ukraine and key to the coal-rich Donets Basin. On 8 August the Germans surrounded two Soviet armies, capturing 100,000 men in the Uman pocket, and reached the Dnieper River. The naval port of Odessa on the Black Sea was also besieged.

Up to this point all seemed to be going well, the only major problem being the time needed for the infantry to catch up with the panzers and mop up pockets of Russian defence. But Soviet resistance was now stiffening, despite catastrophic losses. A German salient around Yelnya, south-east of Smolensk, was recaptured in a costly but successful counterattack.

Meanwhile, Army Group Centre's supply situation was becoming critical. Hitler decided to halt the advance on Moscow and reinforce Army Groups North and South. Hoth's Panzer Group 3 was sent north to support the drive on Leningrad while Guderian's tanks were despatched to help Army Group South take Kiev. The German High Command protested vigorously. The panzers were only 220 miles from Moscow. But Hitler regarded the resource-rich Ukraine as more important. On 21 August he ordered that the conquest of the Crimea and the Donets Basin be given priority.

The Soviets were completely fooled by German moves. Five Soviet armies were trapped in a vast salient around Kiev. As usual, Stalin refused to sanction a withdrawal before the pocket was sealed. By the end of September Kiev had fallen and over 650,000 Russian troops killed or captured. The Germans pushed along the Black Sea coast and into the Crimea, laying siege to Sevastapol. In October Kharkov fell, but by now the Germans were exhausted. The fighting had severely depleted their ranks and supply lines were stretched to the limit. For now, the southern front stayed where it was. In the north too, German forces had reached their limit. In September, with the aid of their Finnish Allies, they cut Leningrad off from the rest of Russia, but lacked the strength to take the city. Instead, Hitler ordered that it be starved into submission. The epic siege would last 890 days.

Hitler now decided to resume the battle for Moscow. On 2 October he unleashed Operation 'Typhoon'. He believed the Russians had been fatally weakened and lacked the strength to defend their capital - one more push would see it fall and victory would be his. But the Red Army had been reinforced. Almost a million Soviet troops were in place, although they had few tanks and aircraft left. A multi-layered ring of defences had been thrown around the capital and its citizens had been mobilised. The German offensive was carried out by a reinforced Army Group Centre, comprising three infantry armies and three panzer groups - 1 million men and 1,700 tanks. However the Luftwaffe was weak after over three months of sustained operations. And the weather was beginning to turn.

Once again the initial assault was a success. The panzer divisions stormed ahead and over 600,000 Russian soldiers were captured in two more huge encirclements near the cities of Bryansk and Vyazma. The Russians were down to about 90,000 men. But as they reached the approaches to Moscow, the German formations slowed to a crawl. Autumn rains had turned the dirt roads into rivers of mud. It was the Rasputitsa - the 'quagmire season' - and wheeled and horse-drawn transport became hopelessly stuck. The Germans chose to temporarily halt operations.

In mid-November, with the temperature dropping and the ground now frozen hard, the panzers attempted a final pincer attack around Moscow itself. The delay had given the Soviets time to bring in further reinforcements, including reservists and troops from Siberia and the eastern borders. The northern German pincer was the most successful and got within 12 miles of the city. German officers could see the Kremlin buildings through their field glasses. The Germans also tried attacking in the centre, along the Minsk-Moscow road. On 2 December a reconnaissance unit got within 5 miles of Moscow. Though tantalisingly close, this was the limit of the entire advance. The depleted German units were exhausted and frozen into inactivity in the deep snow.

On 5 December the Soviets launched a surprise counter-offensive. The Germans were forced into a retreat, despite Hitler's call to defend every foot of ground. Guderian and several other senior generals who advised withdrawal were sacked. The Russians succeeded in crushing various German formations in encirclements of their own. The Luftwaffe struggled to operate but performed vital work ferrying supplies to cut off units and harrying the Russian advance. Army Group Centre was pushed back up to 150 miles from Moscow. A furious Hitler dismissed the commander-in-chief of the German Army, Field Marshal Walther von Brauchitsch, and appointed himself in his place.

I this episode of IWM Stories, John Delaney tells the story of the invasion that changed the course of the Second World War.

Operation 'Barbarossa' had clearly failed. Despite the serious losses inflicted on the Red Army and extensive territorial gains, the mission to completely destroy Soviet fighting power and force a capitulation was not achieved.

One of the most important reasons for this was poor strategic planning. The Germans had no satisfactory long-term plan for the invasion. They mistakenly assumed that the campaign would be a short one, and that the Soviets would give in after suffering the shock of massive initial defeats. Hitler had assured the High Command that 'We have only to kick in the front door and the whole rotten edifice will come tumbling down'. But Russia was not France. The shock value of the initial Blitzkrieg was dissipated by the vast distances, logistical difficulties and Soviet troop numbers, all of which caused attritional losses of German forces which could not be sustained.

Hitler's input has been heavily criticised, not least by his generals at the time. Moscow was always a more important objective to the German High Command than it was to Hitler, who was more concerned with destroying Soviet field armies and capturing vital industrial resources. His switching of the main thrust from the central front to Leningrad in the north and Ukraine in the south was to an extent militarily sensible given the weakness of Army Group Centre after the Smolensk battles and the threats to its flanks. Indeed, the diversion actually worked in the Germans’ favour since it surprised the Soviets and resulted in the destruction of huge Soviet forces around Kiev. But it also threw away Germany's only real chance of outright victory.

The early capture of Moscow would have had an undeniable psychological impact and may have been the tipping point. Guderian in particular believed that using the panzers in traditional encirclement battles played into Russian hands and gave them chances to bring forward fresh reserves. He had advocated an all-out drive on the capital. But when Hitler resumed the assault with Operation 'Typhoon' it was too late. The German Army was now fatally weakened, the weather had worsened and Soviet reinforcements had arrived.

GERMAN INTELLIGENCE FAILURES

German intelligence failures played a large part on several levels. The Red Army had been viewed with distain, especially because Stalin’s purges of the late 1930s had removed thousands of its officers - albeit temporarily in most cases. Its poor performance against the Finns in the winter of 1939-1940 also encouraged the Germans. Soviet industry was deemed incapable of producing modern weapons. Most importantly, Russian troop numbers and fighting strength were continually underestimated, so that despite the losses inflicted in early encirclement battles, the Germans always faced yet more reinforcements. The High Command had only considered the Soviet western army groups in their planning, and the presence of reserve forces and uncommitted formations in the Russian interior or on the eastern borders were disregarded. Even after Operation 'Typhoon' ground to a halt in early December, the Germans still chose to believe that the Soviets had nothing left to stage a counterattack.

While the Germans underestimated the military potential of their opponents, they also exaggerated the capabilities of their own forces, most significantly the four Panzer Groups. The panzer divisions were the principal weapon of Blitzkrieg and at that time were far superior to the Soviets in training, leadership and tactical ability. But they were relatively weak in numbers and equipment.

German tank strength had been halved in 1940 so that the number of divisions could be doubled. Over half the tanks committed to 'Barbarossa' were obsolescent light tanks and Czech-built models, rather than the more capable PzKpfw III and IV. And there were virtually no reserves available. Hitler had so far refused to fully mobilise the German economy and so weapons production was inadequate. Even in mid-1941 only 250 new tanks were being built each month, insufficient to properly equip the army on the eve of a major new campaign, or keep up with the inevitable mechanical and combat losses. Hitler even chose to divert some of these to France and other theatres, when the demand was greatest in Russia.

The vast majority of the 10,000 or so Russian tanks facing the Germans in June 1941 were light BT series tanks or obsolete T-26 models. Huge numbers were destroyed in poorly planned and executed counterattacks. But Soviet tank development and production was already superior to that of the Germans. A new generation of tanks had entered service, namely the T-34 and KV-1. The T-34 in particular was a major leap in tank design and came as a complete shock to the Germans when it was first encountered in July 1941. It had sloping armour - which effectively doubled its strength - and a powerful 76.2mm gun. Its reliable diesel engine gave it a good range and turn of speed, and its wide tracks could cope with mud or snow. Russian industry was already gearing up to turn it out in huge numbers.

Less than a thousand T-34s were available at the start of 'Barbarossa' and most were squandered in piecemeal actions by half-trained crews. But the Red Army could absorb significant losses of equipment as well as men. The mass mobilisation of Soviet industry had been set in train, which included relocating vital tank, aircraft and munitions factories eastwards to the Urals. This huge logistical undertaking was already bearing fruit. It meant that despite the early defeats, the Soviet Union was far better prepared for a long war than the Germans, whose own production of tanks and other weapons would be feeble by comparison.

GERMAN LOGISTICAL PROBLEMS

Logistics was another hugely important factor in the German defeat. No matter how fast or far the fighting formations advanced, they were dependent on timely supplies of fuel and ammunition. This became an ever greater problem as the army progressed deeper into Soviet territory and further away from its own railheads. Not only were the distances much greater than they had been during the French campaign, but the Soviet transport infrastructure was much poorer. German engineers struggled to convert the Russian railway gauge to one which their own locomotives and rolling stock could use. Meanwhile the multitude of lorries and horse-drawn wagons in which the supplies were transported were forced to negotiate Russian dirt roads, which became virtually impassable after prolonged rain.

The debilitating effects of the weather and terrain were not properly taken into account when planning the campaign. The numerous forests, marshes and rivers slowed the advance during the summer. The autumn Rasputitsa and the onset of the brutal Russian winter brought it to a halt during Operation 'Typhoon'. Tank and vehicle lubricants froze as temperatures plunged to record lows. Winter clothing supplies were held up in Poland, as fuel and ammunition took priority. If anything symbolises the failure of 'Barbarossa' it is the image of inadequately equipped German troops shivering in the snows before Moscow.

THE SUCCESS OF SOVIET RESISTANCE

Perhaps the most important reason of all for the defeat of Operation 'Barbarossa' was the tenacious resistance of the defenders. The Germans completely underestimated the Soviet will to fight. Hitler's announcement that the war in the east was one of 'annihilation' and Stalin's astute call to defend 'Mother Russia' rather than his own regime gave the ordinary Russian soldier - no matter how coerced or badly led - every reason to battle to the death. Hitler's infamous 'Commissar Order', which sanctioned the execution of all captured political officers, also stiffened Russian resolve. The Russian soldier was found to be a hardy and implacable foe, and quickly gained the respect of the majority of German front-line troops. No western enemy would come close to the Soviets in sheer staying power.

Despite the failure and huge losses of 'Barbarossa', Hitler launched another major strategic offensive in June 1942, this time towards the Caucasus mountains and the oil fields of Baku beyond. Morale was still generally high and German forces maintained the capacity to inflict further massive losses on badly handled Soviet formations. In fact 1942 would be an even worse year than 1941 for the Russians. But the factors that caused 'Barbarossa' to fail now conspired to doom this new enterprise as well. As the German columns advanced across the seemingly infinite spaces of the steppe towards their distant objectives, including a city named Stalingrad, the victory in the East that had once seemed so certain receded even further from sight.

The Normandy campaign saw the Anglo-American armies inflict a decisive defeat on the German military machine. The British Army's role was pivotal, but victory came at a price. Between D-Day and the end of August some 83,000 British, Canadian and Polish troops became casualties, of whom almost 16,000 were killed. 

For much of the Second World War, the British Army was saddled with a succession of tanks that ranged from the bad to the barely adequate. Some were rushed into service too quickly and proved notoriously unreliable. Others spent too long in development, or only achieved a degree of usefulness after numerous modifications. Most lacked the armour to resist enemy anti-tank weapons, and nearly all were under-gunned.

On 1 September 1939 the German Army, supported by the Air Force (Luftwaffe) and Navy (Kriegsmarine) invaded Poland from three sides. Polish defences, already strained under a powerful and innovative German assault, collapsed shortly after the Soviets launched their own invasion from the east on 17 September. 

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