The Tiger II was issued to heavy tank battalions of the Army and the Waffen-SS. It was first used in combat with 503rd Heavy Panzer Battalion during the Allied Invasion of Normandy on 11 July 1944; on the Eastern Front, the first unit to be outfitted with Tiger IIs was the 501st Heavy Panzer Battalion, which by 1 September 1944 listed 25 Tiger IIs operational.
