There, they were attacked during the Battle of the Scheldt 2 October-8 November 1944. He deployed his force against the Allied advance into the Netherlands. On 24 October 1944 his headquarters in Dordrecht were bombed by the RAF. During the Ardennes offensive starting 16 December 1944, his 15th Army was tasked with fixing the British and U.S. forces north of the Bulge (see also Operation Blackcock, Operation Grenade.) Von Zangen surrendered in April 1945 in the Ruhr Pocket.