The Borgward IV, officially designated Schwerer Ladungstrager Borgward B IV (heavy explosive carrier Borgward B IV), was a German remote-controlled demolition vehicle used in World War II. Near the end of World War II, approximately 56 Ausf. Bs and Cs were converted to the Panzerjager Wanze, armed with six RPzB 54/1 anti-tank rockets. In the last days of the war, these vehicles fought some minor skirmishes against Soviet armour and saw some action at the Battle of Berlin.