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. In October 1944 I., II., and III., were re-designated KG(J) to convert to fighter aircraft for the Defence of the Reich operations. The Gruppen remained active until the last day of the war. IV.(Erg.)/KG 55 was disbanded on 21 November 1944. The independent 14.(Eis)/KG 55 on 27 April 1945.