Poland / Soviet Union 1940 ▶ Katyn Massacre by Soviet NKVD (April 1940) Exhumation Mass Grave (1943)

031 Poland / Soviet Union 1940 ▶ Katyn Massacre by Soviet NKVD - Exhumation Mass Grave 1943 21,768 Polish Officers executed in Katyn forest massacre by the Soviet NKVD - April 1940 - Joseph Stalin Lavrentiy Beria German History Archive ▶ Польша / Советский Союз 1940 ▶ Катынская резня советского НКВД - Эксгумационная массовая могила 1943 г. Katyn Massacre: Mass execution of Polish military officers by the Soviet Union during World War II. The discovery of the massacre precipitated the severance of diplomatic relations between the Soviet Union and the Polish government-in-exile in London. After Nazi Germany and the Soviet Union concluded their Nonaggression Pact of 1939 and Germany invaded Poland from the west, Soviet forces occupied the eastern half of Poland. As a consequence of this occupation, tens of thousands of Polish military personnel fell into Soviet hands and were interned in prison camps inside the Soviet Union. But after the G