The Panzer Division "Kempf", also East Prussia Panzer Formation was an ad hoc combined arms formation consisting of regular German Army personnel and SS. It was created for operations out of East Prussia during the Invasion of Poland in 1939. The formation was generally called Panzer Division "Kempf" after General der Panzertruppe Werner Kempf assumed command, though it was only about half the strength of the other Panzer Divisions of the time.