Hitler’s Super V3 Cannon during WW2 Hitler’s Super V3 Cannon, developed during World War II, was a massive, long-range artillery piece designed to bombard London from mainland Europe. Known as the "V3," it used a multiple-chamber system to fire projectiles at extreme distances. Despite its enormous size and potential, the V3 cannon faced technical challenges and was never fully operational. Allied forces destroyed the site before it could be used in combat, making it one of many failed "wonder w