4th Pursuit Squadron, Interceptor, 4th Fighter Squadron & 4th Fighter Squadron, Single Engine

Constituted 4th Pursuit Squadron (Interceptor) on 20 Nov 1940. Activated on 15 Jan 1941. Redesignated: 4th Fighter Squadron on 15 May 1942; 4th Fighter Squadron, Single Engine, on 20 Aug 1943. Inactivated on 7 Nov 1945.

Stations. Selfridge Field, MI, 15 Jan 1941; Langley Field, VA, 17 Dec 1941; Selfridge Field, MI, 14 Jan 1942; Florence, SC, 18 Feb 1942; Wilmington, NC, 27 Apr 1942; Grenier Field, NH, 12 Jun-19 Jul 1942; Northern Ireland, 19 Aug 1942; Goxhill, England, 25 Aug-29 Oct 1942 (air echelon arrived at Tafaraoui, Algeria, on 8 Nov 1942); La Senia, Algeria, 12 Nov 1942; Orleansville, Algeria, 1 Jan 1943; Telergma, Algeria, 19 Jan 1943; Youks-les-Bains, Algeria, 8 Mar 1943; Le Sers, Tunisia, 12 Apr 1943; La Sebala, Tunisia, 20 May 1943; Boccadifalco, Sicily, 1 Aug 1943; Corsica, 4 Dec 1943; Madna Airfield, Italy, c. 14 May 1944; Piagiolino Airfield, Italy, c. 24 Apr 1945; Lesina, Italy, c. 10 Jul-Aug 1945; Drew Field, FL, 25 Aug-7 Nov 1945.