1940 in Poland

The Intelligenzaktion (), or the Intelligentsia mass shootings, was a series of mass murders committed against the Polish intelligentsia (teachers, priests, physicians, and other prominent members of Polish society) during the early years of the Second World War (1939–45) by Nazi Germany. The Germans conducted the operations in accordance with their plan to Germanize the western regions of occupied Poland, before their territorial annexation to the German Reich.

Nazi concentration camp in Działdowo

Polish underground political and military organization operating in 1940–1943

Nazi-German forced labor camp in occupied Poland