Fritz X
"Kampfgeschwader" 100 (KG 100) was a Luftwaffe medium and heavy bomber wing of World War II, and the first military aviation unit to use an unpowered precision-guided munition in combat to sink a warship on 9 September 1943 with the destruction of the Italian battleship "Roma", in the first successful use of the Fritz X armor-piercing, gravity PGM ordnance.