1949: June: The 345th Troop Carrier Squadron activated as a unit.

1951: April: 345th TCS entered active service as a part of the Korean War build-up. Using C-46s, it began an intensive training program to become combat qualified as a unit of Tactical Air Command. July 1951-- Participated in flood relief missions in Kansas. Soon after converting to C-119 aircraft that year the squadron's active tour ended.

1953: Jan. 16 - Inactivated in Memphis, Tenn.

1955: March 8 - Reactivated as the 345th Troop Carrier Squadron, (Assault, Rotary Wing), Sewart AFB, Tenn., commenced training with H-19 and H-21 helicopters.

1955 and 1956: Collected data and samples for radiological assessment during atomic tests in Nevada; evacuated Air Force personnel from Washington, D.C., during a major civil defense drill; airlifted men and cargo to construction sites along the mid-Canada and Distant Early Warning radar lines; and participated in joint Army-Air Force maneuvers in Louisiana. - July 9, 1956.

345^th H-21's supporting construction of DEWLINE site on Barter Island, Alaska - 1955

Commanders ; Maj James F. Fowler, 1955; Maj Gregg D. Hartley, 19 May-9 Jun 1956.

Inactivated again, Oct. 8, 1956.. The personnel, aircraft, and equipment of the 345th Troop Carrier Squadron (Assault, Rotary Wing) were absorbed into the newly activated 20^th, 21st, 22nd, 23^rd, and 24^th Helicopter Squadrons.

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(1956 -Reactivated as the 345th Troop Carrier Squadron, Assault, Fixed Wing and began training with C-123s taking part in exercises both inside and outside the United States)