Events similar to or like War crimes in occupied Poland during World War II

Crimes against the Polish nation committed by Nazi Germany and Axis collaborationist forces during the invasion of Poland, along with auxiliary battalions during the subsequent occupation of Poland in World War II, consisted of the murder of millions of ethnic Poles and the systematic extermination of Jewish Poles. The Germans justified these genocides on the basis of Nazi racial theory, which regarded Poles and other Slavic peoples as racially inferior Untermenschen and depicted Jews as a constant threat. Wikipedia

German zone of occupation established after the invasion of Poland by Nazi Germany, Slovakia and the Soviet Union in 1939 at the onset of World War II. Split into three zones: the General Government in its centre, Polish areas annexed by Nazi Germany in the west, and Polish areas annexed by the Soviet Union in the east. Wikipedia

The history of Poland from 1939 to 1945 encompasses primarily the period from the invasion of Poland by Nazi Germany and the Soviet Union to the end of World War II. Invaded by Nazi Germany on 1 September 1939 and by the Soviet Union on 17 September. Wikipedia

The genocide of European Jews during World War II. Between 1941 and 1945, Nazi Germany and its collaborators systematically murdered some six million Jews across German-occupied Europe, around two-thirds of Europe's Jewish population. Wikipedia

Formally concluded with the defeat of Germany by the Allies in May 1945. Divided between Nazi Germany and the Soviet Union both of which intended to eradicate Poland's culture and subjugate its people. Wikipedia

Around 6 million Polish citizens perished during World War II: about one fifth of the pre-war population. Most were civilian victims of the war crimes and crimes against humanity during the occupation by Nazi Germany and the Soviet Union. Wikipedia