What When
  • Today
  • Years
  • Calendar
  • Collections
  • Recurring
  • Tags
  • Today
  • Years
  • Calendar
  • Collections
  • Recurring
  • Tags
Today is July 31, 2025

Events with tag - Soviet Invasion

Soviet Invasion of Poland

September 17, 1939

Soviet Invasion of Poland

On September 17, 1939, the Soviet Union, breaking existing international treaties, launched a military invasion of Poland. The attack was the implementation of the secret protocol of the Ribbentrop-Molotov Pact and occurred when Poland was fighting a desperate battle against Nazi Germany. About 600,000 Red Army soldiers, supported by 4,700 tanks and 3,300 aircraft, crossed Poland's eastern border, beginning a period of Soviet occupation and mass repression against civilians.

Red Army Invasion of Poland

September 17, 1939

Red Army Invasion of Poland

On September 17, 1939, the Red Army began its invasion of Poland, implementing the secret provisions of the Molotov-Ribbentrop Pact. The attack was launched without a declaration of war while the Polish army was fighting the Germans in the west. The Soviet aggression led to the occupation of eastern Poland, mass deportations of the population, and crimes against Polish officers and intelligentsia.

Red Army Invasion of Poland

September 17, 1939

Red Army Invasion of Poland

On September 17, 1939, the Red Army crossed Poland's borders, implementing the secret provisions of the Molotov-Ribbentrop Pact. This event, along with the subsequent Soviet troops' entry in 1944, fundamentally changed Poland's fate, leading to the installation of communist rule and significant territorial changes after World War II.

WhatWhen.day
© 2025 WhatWhen.day. All rights reserved.
Navigation
  • Today's Events
  • Terms of Service
  • Privacy Policy
  • About
  • Roadmap
Contact

Have questions or suggestions? We'd love to hear from you!

Email us→

Didn't find what you were looking for?