The Soviet invasion of Poland was a military conflict by the Soviet Union without a formal declaration of war. On 17 September 1939, the Soviet Union invaded Poland from the east, 16 days after Nazi G
Soviet parade in Lwów, September 1939, following the city's surrender
Hitler watching German soldiers marching into Poland in September 1939
Advancing Red Army troops, Soviet invasion of Poland, 1939
Instructions of Józef Beck, Polish minister of foreign affairs for Wacław Grzybowski, Polish ambassador to the Soviet Union concerning the Soviet invasion of Poland, 17 September 1939
The Katyn massacre was a series of mass executions of Poles carried out by the Soviet Union between April and May 1940. Though the killings also occurred in the NKVD prisons in Kalinin, Kharkiv and el
Soviet invasion of Poland
…the Polish officers they captured at the Battle of Szack on 28 September 1939. The NKVD killed 22,000 Polish military personnel and civilians in the Katyn massacre in 1940. Torture was widely used by the NKVD in various prisons, especially in small towns. On 28 September 1939, the Soviet Union and Germany signed…
Mass grave of Polish officers in Katyn Forest, exhumed by Germany in 1943
Soviet Foreign Minister Vyacheslav Molotov signs the Molotov–Ribbentrop Pact. Behind him: Ribbentrop and Stalin.
Polish POWs captured by the Red Army during the Soviet invasion of Poland
Memo from Beria to Stalin which proposed the execution of Polish officers, policemen, etc.