On 10 February 1942, the United States district engineer recommended a "5,450-acre dry farming area in Kearns" for an inland Army training site. For one of "the eight new technical training installations rushed into operation" during 1942-3, a Kearns, Utah "plot of 1,405 acres was purchased". The Kearns Center military unit was activated 1 May 1942, and "a contract for a theater of operations cantonment was let" on 16 June 1942. "Basic Training Center No. 5" began operations on 17 July and opened on 20 July under Training Command. A "Denver and Rio Grande Western" spur was built to the installation's railroad station, and by 21 August all barracks were complete. "Upon completion of their basic training most of the pre-aviation cadets sent to one of the many college operated under the supervision of the Army Air, known as the Civilian Pilot Training Program. The 510th Training Group and three technical school squadrons were assigned to Kearns on 10 September 1942, and Kearns' commander, Colonel Leo F. Post, arrived by September 12. Construction was completed in October 1942 and Kearns' "basic military training and technical training" continued until 30 September 1943.
Kearns Army Air Field was the flight facility constructed on the larger base and was used by 9 B-24 Liberator bombardment groups--459th, 460th, 455th, 456th, 465th, 466th, 467th, 458th and from Gowen Field, 461st, formed 31 August-17 October 1943. The base transferred to Second Air Force on 1 October 1943, and the bomb groups all were reassigned by the end of 1943. In January 1944, Kearns AAF began performing personnel replacement training, rather than group training. In April, ground echelon training for B-24 support personnel was ended.
Redesignated Army Air Base, Kearns on 1 October 1944 when transferred to the Second Air Force, command of the base transferred from Converse R. Lewis to Colonel Walter F. Siegmund. Both the "Overseas Replacement Depot, Kearns, Utah" and "Salt Lake City Army Air Field under command jurisdiction of Kearns ORD" transferred to Strategic Air Command on 21 March 1946. Kearns ORD and SLC AAFld transferred to AAFTC on 30 April and Kearns finally transferred to Air Defense Command. The base was inactivated on 15 August 1946 and transferred to the War Assets Administration for disposal. The War Assets Administration declared Kearns surplus on 24 January 1947, and the high bid by Standard Surplus was opened in July 1948 for the installation with only 100 remaining buildings. A "Camp Kearns Memorial" was emplaced at the Arlo D. James KearnsVeterans Memorial Park.