339th Fighter Squadron, 339th Fighter Squadron, Twin Engine & 339th Fighter Squadron, Two Engine

Constituted as 339th Fighter Squadron on 29 Sep 1942. Activated on 3 Oct 1942. Redesignated as: 339th Fighter Squadron (Twin Engine) on 23 Feb 1943; 339th Fighter Squadron, Two Engine, on 20 Aug 1943. Inactivated on 1 Jan 1946.

Stations. New Caledonia, 3 Oct 1942 (detachment operated from Guadalcanal, 3 Oct 1942–1 Dec 1943); Guadalcanal, 29 Dec 1943; Stirling Island, 15 Jan 1944; Sanspor, New Guinea, 15 Aug 1944; Middleburg Island, 19 Sep 1944 (operated from Morotai, 13 Feb–25 Mar 1945); San Jose, Mindoro, 22 Feb 1945; Puerto Princesa, Palawan, 6 Mar–11 Dec 1945; Camp Stoneman, CA, 30 Dec 1945–1 Jan 1946.