As Nazi Germany faced severe defeat after the Battle of Kursk and especially the cross-channel invasion it introduced cross-channel use of the V-1 flying bomb and V-2 rocket, although too late and too ineffectively to turn the war to its advantage. The German military machine was developing jet aircraft as fighters and bombers and long-range missiles, but far too late (they were only in the design and test stages) to change the outcome of the war. The victorious Allies would incorporate the early innovations of jet technology and long-distance rocket-based missiles into their armed forces, but only after the end of World War II after getting them beyond the developmental stages of design and testing.