Fritz X
Both the Luftwaffe and USAAF pioneered the use of what would come to be known as precision-guided munitions during World War II. The Luftwaffe was the first to use such weapons with the Fritz X armor-piercing anti-ship glide bomb on September 9, 1943, against the Italian battleship "Roma". III."Gruppe"/KG 100's Dornier Do 217 medium bombers achieved two hits, exploding her powder magazines and sinking her. Both the Fritz X and the unarmored, rocket-boosted Henschel Hs 293 guided glide bomb were used successfully against Allied shipping during the Allied invasion of Italy following Italy's capitulation to the Allies earlier in September 1943. Both weapons used the Kehl-Strasbourg radio control link: a joystick-equipped "Funkgerät" FuG 203 "Kehl" transmitter in a deploying aircraft, with the corresponding FuG 230 "Straßburg" receiver in the ordnance for guidance.