345th Fighter Squadron

Activated on 1 October 1942 at RAF Duxford, England by special authority of the USAAF by Eighth Air Force. Assigned to VIII Fighter Command, equipped with a mixture of United States personnel reassigned from the 31st and 52d Fighter Groups, and Americans transferred from the Royal Air Force who had volunteered to join the RAF prior to the United States entry into the European War, 11 December 1941.

Squadron was initially equipped with export/Lend-Lease version of P-39D Airacobra, designated Airacobra I by the RAF with additional aircraft that had been sold to France that been impounded by the British after the Fall of France. These aircraft were re-designated as P-400. Deployed to French Morocco and assigned to Twelfth Air Force where the unit engaged in combat during the North African campaign. Briefly equipped with P-38 Lightnings from June to Sept 1943 each Squadron was assigned two P-38s to intercept and destroy high flying Luftwaffe reconnaissance aircraft sent to photograph the allied invasion fleet gathering along the North African coast for the invasion of Sicily.

Re-equipped with P-47D Thunderbolts, January 1944 and engaged in combat during Italian Campaign. Also covered Allied landings on Elba in June 1944 and supported the invasion of southern France in August. Returned to Italy and fought in Po Valley, 1944–1945 until the end of the European War in May 1945.

Demobilized and inactivated, 7 November 1945. Unit designation allocated to Pennsylvania Air National Guard, re-designated as 146th Fighter Squadron, 24 May 1946.

 This article incorporates public domain material from the Air Force Historical Research Agency.

• Maurer, Maurer, ed. (1982) [1969]. Combat Squadrons of the Air Force, World War II (PDF) (reprint ed.). Washington, DC: Office of Air Force History. ISBN 0-405-12194-6. LCCN 70605402. OCLC 72556.