Kampfgeschwader 55 "Greif" (KG 55 or Battle Wing 55) was a Luftwaffe bomber unit during World War II. KG 55 was one of the longest serving and well-known in the Luftwaffe. The wing operated the Heinkel He 111 exclusively until 1943, when only two staffeln of its four Gruppen (Groups) used the Junkers Ju 88C.