During WW2, the most powerful and advanced Axis air-force belonged to Germany. Although the Treaty of Versailles had not permitted Germany to make an air force, the Nazis did it anyway. Known as the Luftwaffe, the German air-force would be the first to use air-to-air missiles, air-to-ground missiles, and jet planes. During the Blitz, the German fighter planes were tasked with defending the German bombers. However, the fighters were soon shifted to defending against Allied bombers.