Key facts and dates

The Nazi-Soviet Pact of 1939 was a pivotal agreement that reshaped international alliances on the eve of the Second World War, with profound consequences for Europe and the Soviet Union. This timeline captures the critical events surrounding the pact and its immediate aftermath.

Timeline of key events

• 23 August 1939 – Nazi-Soviet Pact (Molotov-Ribbentrop Pact) signed between Germany and the USSR.
• 1 September 1939 – Germany invades Poland from the west, initiating the Second World War.
• 17 September 1939 – Soviet Union invades eastern Poland, completing the fourth partition.
• November 1939–March 1940 – Winter War between the USSR and Finland exposes Soviet military weaknesses.
• June–July 1940 – Soviet Union annexes the Baltic states (Estonia, Latvia, Lithuania).
• June 1940 – USSR seizes Bessarabia from Romania.
• June 1941 – Germany invades the Soviet Union, breaking the pact.

Origins and motivations behind the Nazi-Soviet Pact

The Nazi-Soviet Pact, also known as the Molotov-Ribbentrop Pact, signed on 23 August 1939, was a surprising alliance between two ideologically opposed regimes. This agreement emerged from a complex web of distrust, strategic calculations, and failures in international diplomacy, setting the stage for the early phases of the Second World War.

Reasons for the alliance

• Failure of collective security - Stalin grew disillusioned with Western powers' inability to form a united front against Nazi aggression, as efforts to create alliances with Britain and France repeatedly stalled.
• Munich betrayal - The 1938 Munich Agreement, where Britain and France appeased Hitler by allowing the annexation of the Sudetenland, led Stalin to believe the West hoped to divert German expansion eastward towards the USSR.
• Strategic calculation - Stalin saw the pact as a means to redirect German aggression westward, buying time for the Soviet Union to strengthen its military and industrial capabilities in preparation for potential conflict.
• Mutual benefits - For Hitler, the pact neutralised the threat of a two-front war, allowing Germany to focus on Western Europe, while Stalin gained territorial and security advantages in Eastern Europe.

Key terms and secret protocols of the pact

The Nazi-Soviet Pact was publicly presented as a non-aggression agreement, but it contained hidden elements that revealed the true scope of the deal. These terms reshaped the geopolitical landscape of Eastern Europe and sowed the seeds for further conflict.

Public terms of the agreement

• The pact included a commitment to non-aggression between Germany and the USSR, ensuring neither side would attack the other.
• Trade agreements provided mutual economic benefits such as Soviet raw materials for German industry.

Secret protocols

Hidden clauses divided Eastern Europe into spheres of influence:

• The Baltic states (Estonia, Latvia, Lithuania) and eastern Poland were allocated to the Soviet Union.
• Germany would control western Poland.
• The USSR expressed interest in Bessarabia, a region of Romania, as part of its territorial ambitions.

These secret arrangements allowed both powers to expand without immediate interference from each other, effectively partitioning vulnerable territories and ignoring the sovereignty of smaller nations.

Immediate consequences: invasion of Poland and Soviet expansion

The signing of the pact had immediate and dramatic effects, most notably triggering the outbreak of the Second World War. It enabled coordinated aggression in Eastern Europe and facilitated Soviet territorial gains, though not without challenges.

The invasion of Poland

• German invasion - On 1 September 1939, Germany invaded Poland from the west, marking the start of the Second World War as Britain and France declared war on Germany.
• Soviet involvement - On 17 September 1939, the Soviet Union invaded eastern Poland, completing what became known as the fourth partition of Poland, a historical reference to earlier divisions of Polish territory by surrounding powers.
• Soviet justification - The USSR claimed this action was to "liberate" ethnic Ukrainians and Belorussians living in eastern Poland, portraying the invasion as a protective measure rather than aggression.

Soviet territorial expansion

• Annexation of Baltic states - In June–July 1940, the Soviet Union forcibly incorporated Estonia, Latvia, and Lithuania under the guise of mutual assistance pacts, establishing control over strategic territories.
• Winter War with Finland - From November 1939 to March 1940, the USSR fought Finland after demanding territorial concessions; though ultimately victorious, the conflict exposed significant weaknesses in the Red Army's organisation and readiness.
• Seizure of Bessarabia - In June 1940, the Soviet Union took Bessarabia from Romania, further expanding its influence in Eastern Europe as per the secret protocols of the pact.

Impact on international relations and communism

The Nazi-Soviet Pact sent shockwaves through global politics, fundamentally altering alliances and creating ideological confusion. Its effects were particularly pronounced within the communist movement, which struggled to reconcile the alliance with its principles.

Effects on international communism

• Confusion and demoralisation - Communist parties worldwide, previously staunchly anti-fascist, were thrown into disarray as they were forced to defend the pact and oppose what was now labelled an "imperialist" war waged by Britain and France.
• Propaganda reversal - Soviet media shifted dramatically, portraying Germany as a friendly power rather than the fascist enemy, a stark contrast to earlier anti-Nazi rhetoric that left many supporters disillusioned.

Broader geopolitical impact

• Material support for Germany - The USSR supplied Germany with critical resources such as oil, grain, and raw materials, directly aiding the German war effort against Britain and France in the early stages of the conflict.
• Western distrust - The pact deepened mistrust between the Soviet Union and the Western Allies, complicating future cooperation and reinforcing perceptions of Soviet opportunism in the face of Nazi aggression.

Stalin's miscalculations and the pact's long-term significance

While the Nazi-Soviet Pact initially appeared to serve Soviet interests, it was underpinned by serious misjudgements on Stalin's part. Its long-term consequences continue to be debated by historians, particularly regarding its role in the eventual German invasion of the USSR.

Stalin's strategic errors

• Misplaced trust in Hitler - Stalin believed the pact would hold and that Germany would respect the non-aggression terms, underestimating Hitler's ultimate aim to expand eastward.
• Ignoring intelligence warnings - Despite numerous reports and intelligence indicating German plans for an invasion, Stalin dismissed these as provocations, leaving the USSR unprepared for Operation Barbarossa in June 1941.
• Delayed military preparation - Collaboration with Germany may have lulled Stalin into a false sense of security, delaying critical reforms and mobilisation of Soviet forces that could have better resisted the eventual attack.

Evaluating the pact's significance

• Buying time and space - Some argue the pact achieved its short-term goal by providing the USSR with nearly two years to prepare, alongside territorial buffers in Eastern Europe that absorbed initial German advances in 1941.
• Risks of collaboration - Others contend that Stalin's alignment with Hitler delayed essential military readiness, fostered complacency, and ultimately made the German invasion more devastating due to the element of surprise and Soviet unpreparedness.
• Historical debate - The pact remains a contentious issue: did it represent a pragmatic move to safeguard Soviet interests, or a catastrophic misstep that contributed to immense losses when Germany turned on its ally? The answer lies in balancing the immediate gains against the long-term costs.