In military history, the German term Kampfgruppe (pl. "Kampfgruppen"; abbrev. KG, or KGr in "Luftwaffe" usage during World War II, literally "fight group" or "battle group") can refer to a combat formation of any kind, but most usually to that employed by the Wehrmacht of Nazi Germany and its allies during World War II and, to a lesser extent, of the German Empire in World War I.