The group was again active in the reserve from 1947 to 1949, but does not appear to have been fully manned or equipped with operational aircraft during this period. It was again activated in October 1952, as the Air Force reopened Whiteman Air Force Base, Missouri. It flew Boeing B-47 Stratojets at Whiteman until September 1963, as the B-47 began to be withdrawn from Strategic Air Command operations. It was inactivated with the withdrawal of its Stratojets.
Established as a North American B-25 Mitchell medium bomber squadron in mid-1942, trained by Third Air Force in the southeastern United States. Deployed to IX Bomber CommandinEgypt initially in March 1943 via the South Atlantic Route through the Caribbean, Brazil, Liberia, Central Africa and Sudan, then reassigned to XII Bomber Command in Tunisia. Supported Allied ground forces in Tunisian Campaign; participated in Invasions of Sicily and Italy during 1943, supporting Allied ground forces with tactical bombing of enemy targets. Participated in liberation of Corsica during the spring of 1944, then returned to Italy engaging in attacks on enemy ground forces and targets in the Po Valley during the spring of 1945.
Personnel demobilized in Italy during summer of 1945; squadron returned to the United States, being prepared for deployment to Pacific Theater for use as a tactical bomb squadron in programmed Invasion of Japan. Japanese capitulation led to squadron's inactivation in November 1945.
Reactivated in October 1952 as a Strategic Air Command (SAC) Boeing B-47 Stratojet squadron. Initially equipped with prototypes of the Boeing RB-47B Stratojet (YRB-47) to perform long-range photo-reconnaissance with a flight of Boeing B-29 Superfortress bombers assigned. In November 1953 began to receive production B-47E medium bomber aircraft; prototype reconnaissance aircraft already received exchanged for medium bomber versions. Participated in SAC Operation Reflex deployments to Europe and North Africa throughout the 1950s and 1960s.
In 1963 with the phaseout of the B-47 the aircraft sent to storage at Davis–Monthan Air Force Base, Arizona and the squadron was inactivated.
^See Haulman, Daniel (1 November 2016). "Factsheet 340 Flying Training Group (AFRC)". Air Force Historical Research Agency. Retrieved 13 February 2021. (redesignation of 340th Group).
^Lineage information through May 1963 in Maurer, Combat Squadrons, p. 585, except as noted
^See Ravenstein, p. 179 (end of assignment to 340th Wing); Mueller, p. 589 (end of stationing at Whiteman).
Watkins, Robert A. (2009). Insignia and Aircraft Markings of the U.S. Army Air Force In World War II. Vol. IV, European-African-Middle Eastern Theater of Operations. Atglen,PA: Shiffer Publishing, Ltd. ISBN978-0-7643-3401-6.