4 inch 523rd Tactical Fighter Squadron Crusaders Patch
The 523d Fighter Squadron is an inactive United States Air Force unit. Its last assignment was with the 27th Operations Group stationed at Cannon Air Force Base, New Mexico.
During World War II, its predecessor unit, the 17th Bombardment Squadron (Light) fought in the Philippines campaign (1941–1942). Its ground personnel fought as infantry in the Battle of Bataan with the survivors being forced to march as prisoners in the Bataan Death March. The squadron reformed with its present numerical designation, and by the end of World War II, the Airmen of the 523d were among the most decorated USAAF units of the war, having fought in the North African, Sicilian, Italian and Southern France campaigns in the European Theater.
Until its inactivation in 2007, the 523d had been engaged in every major combat action the United States had engaged in since its activation in 1940 (World War II, both Pacific and European Theaters; Korean War; Vietnam War; Operation Desert Storm; Global War on Terrorism).
Constituted as the 17th Bombardment Squadron (Light) on 22 December 1939
Activated on 1 February 1940
Redesignated 523d Fighter-Bomber Squadron on 23 August 1943
Redesignated 523d Fighter Squadron, Single Engine on 30 May 1944
Inactivated on 7 November 1945
Activated on 20 August 1946
Redesignated: 523d Fighter Squadron, Two Engine on 22 July 1947
Redesignated 523d Fighter Squadron, Jet on 1 December 1949
Redesignated 523d Fighter-Escort Squadron on 1 February 1950
Redesignated 523d Strategic Fighter Squadron on 20 January 1953
Redesignated 523d Fighter-Bomber Squadron on 1 July 1957
Redesignated 523d Tactical Fighter Squadron on 1 July 1958
Redesignated 523d Fighter Squadron on 1 November 1991
Inactivated on 30 September 2007