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How did the German-Soviet Nonaggression Pact affect Poland in 1939?
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Third Reich
A Nazi Party rally at Nürnberg, Germany, in 1933.
The German-Soviet Nonaggression Pact, signed on August 23, 1939, was a pivotal agreement that facilitated the destruction of Poland as a sovereign state. While the public terms emphasized nonaggression between Germany and the Soviet Union, a secret protocol appended to the pact divided eastern Europe into spheres of influence, effectively marking Poland for partition.1
For Adolf Hitler, the pact was a strategic necessity that allowed his military to invade Poland from the west on September 1, 1939, without the risk of a two-front war against the Soviets. The pact’s impact on Poland was catastrophic:1
- Dual Invasion: Following the German attack, Soviet forces invaded Poland from the east on September 17, 1939, trapping the Polish military between two hostile powers.12
- Partition: The two nations formally partitioned the country. A secret protocol initially set the dividing line along the Narew, Vistula, and San rivers, but this was later adjusted eastward to the Bug River in a subsequent agreement on September 28, 1939.12
- Loss of Sovereignty: The coordinated aggression forced the Polish government and high command into exile, leading to the total collapse of organized Polish resistance by early October 1939.2