 Chronologically, the first German World War II crime, and also the very first act of the war, was the bombing of Wieluń, a town where no targets of military value were present.More significantly, The Holocaust of the Jews and Poles, the Action T4 killing of the disabled and the Porajmos of the Gypsies are the most notable war crimes committed by Nazi Germany during World War II.Not all of the crimes committed during the Holocaust and similar mass atrocities were war crimes.