reserve units were elevated to active service and assigned directly to HQ TAC. HQ TAC ordered the 315th Troop Carrier Group to deploy from Greenville AFB to Brady Air Base, Japan with C-46 Commando transports. Also the 314th Troop Carrier Group was ordered to Japan with the new C-119 Flying Boxcar to support the United Nations forces in the conflict. The 314th was ordered to Japan primarily to support the 187th Regimental Combat Team, a United States Army airborne unit that was on its way to Japan by ship, but when the aircrews arrived, they found themselves heavily involved in logistical support operations between Japan and South Korea as well as performing combat cargo airdrops and the occasional airborne parachute operation. On 16 October 1950, the 375th Troop Carrier Wing was activated at Greenville AFB. The 375th was an Air Force Reserve unit previously based at Greater Pittsburgh Airport. After a period of intensive training, the C-82s of the 375th participated in troop carrier and airlift operations, paratroop drops, and other exercises until being returned to the reserves in July 1952. Its aircraft at Donaldson were taken over by the newly activated 17th Troop Carrier squadron. The older C-82s were replaced by C-119s in 1953 and the 17th remained on active duty until 21 July 1954 when it returned to reserve status. Also on 16 October 1950, the Air Force Reserve's 433d Troop Carrier Wing was activated, its three squadrons flying the C-119. On 20 July 1951, the wing was reassigned to USAFE and ordered to Rhein-Main Air Base, West Germany. The 57th Troop Carrier Squadron flew the C-82 Packet and C-45 cargo planes. Between 20 February and 11 April 1952, the unit operated on temporary duty from Brownwood Municipal Airport, performing paratroop drops and other exercises in support of Army maneuvers. Eighteenth Air Force operations In March 1951 the base was renamed 'Donaldson Air Force Base' and on 26 June, the Eighteenth Air Force was activated in 1951 to discharge Tactical Air Command's troop carrier responsibilities. Its mission was to organize, administer, equip, train, and prepare for combat troop carrier missions. The Eighteenth Air Force inherited nine continental "medium" troop carrier wings (314th, 375th, 403d, 433d, 434th, 435th, 443d, 514th and 515th), seven of which were Air Force Reserve wings called to active duty during the Korean War. The command added a "heavy" (C-124) wing (62d) in the Fall