101st SS Heavy Panzer Battalion (in German Schwere SS-Panzer-Abteilung 101, commonly abbreviated as s.SS-Pz. Abt. 101) was one of the Waffen-SS's elite armored units, acting as a 'fire brigade' and a crack assault unit on all fronts. With the introduction of new Tiger II - "King Tiger" tanks in late 1944, it was redesignated the Schwere SS-Panzer-Abteilung 501.