Army Group Vistula
Steiner was chosen by Heinrich Himmler to oversee the creation of and then command the SS Division Wiking. In 1943, he was promoted to the command of the III SS Panzer Corps. On 28 January 1945, Steiner was placed in command of the 11th SS Panzer Army, which formed part of a new Army Group Vistula, an ad-hoc formation to defend Berlin from the Soviet armies advancing from the Vistula River.