Sonderaktion Krakau: a 1939 Nazi round-up professors and academics of the Jagiellonian University World War II atrocities in Poland Pacification operations in German-occupied Poland Operation Tannenberg Generalplan Ost Gestapo–NKVD conferences (1939-1940) Intelligenzaktion Katyn massacre Anti-Polonism History of Poland (1939–45) Chronicles of Terror