In early October 1944, the corps was pulled back from the front line for rest and refit in Westfalen. Refitting was complete by early December, and it was ordered to the Ardennes region to join Sepp Dietrich's Sixth SS Panzer Army, in preparation for an offensive codenamed Wacht Am Rhein, and the ensuing Battle of the Bulge. The corps played a major role in the battle with Kampfgruppe Peiper of the Leibstandarte forming a mobile spearhead.[6] After several weeks heavy fighting with severely limited fuel supplies, and heavy Allied air attacks, the corps was exhausted.