Schwere SS-Panzer-Abteilung 101, meaning Heavy SS-Tank Battalion 101, commonly abbreviated as s.SS-Pz. Abt. 101 was one of 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 - Royal Tiger tanks in late 1944, it was redesignated Schwere SS-Panzer-Abteilung 501.