Erich Julius Eberhard von dem Bach-Zelewski was a high-ranking SS commander of Nazi Germany of Kashubian-Polish origin. During World War II, he was in charge of the Nazi security warfare against those designated by the regime as ideological enemies and any other persons deemed to present danger to the Nazi rule or Wehrmacht's rear security in the occupied territories of Eastern Europe. It mostly involved atrocities against the civilian population. In 1944, he led the brutal suppression of the Warsaw Uprising. Despite his responsibility for numerous war crimes and crimes against humanity, Bach-Zelewski did not stand trial in the Nuremberg trials, and instead appeared as a witness for the prosecution. He was later convicted for politically motivated murders committed before the war and died in prison in 1972.

Around six million Polish citizens are estimated to have perished during World War II. Most were civilians killed by the actions of Nazi Germany, the Soviet Union, the Lithuanian Security Police, as well as the Organization of Ukrainian Nationalists and its offshoots.