Curtiss C-46 Commando transports. However, on 1 January 1953, the 403d Troop Carrier Wing, a reserve unit that had served with Far East Air Forces in Japan and Korea, was relieved from active duty and replaced the 454th Wing at Portland. As a result, the 736th inactivated and transferred it personnel and equipment to the 63d Troop Carrier Squadron, which was activated in its place. Strategic Air Command In February 1963, Strategic Air Command (SAC) organized the 454th Bombardment Wing at Columbus Air Force Base, Mississippi, where it assumed the aircraft, personnel and equipment of the discontinued 4228th Strategic Wing. The 4228th was a Major Command controlled (MAJCON) wing, which could not carry a permanent history or lineage, and SAC wanted to replace it with a permanent unit. As part of this reorganization, the 736th was again designated the 736th Bombardment Squadron, was organized, and assumed the mission, personnel and equipment of the 492d Bombardment Squadron, which was simultaneously inactivated. One half of the squadron's Boeing B-52F Stratofortresses were maintained on fifteen minute alert, fully fueled and ready for combat to reduce vulnerability to a Soviet missile strike. In addition, the squadron trained for strategic bombardment missions. The squadron was one of the first to deploy its planes and aircrews to support Operation Arc Light, SAC operations in Southeast Asia, starting its first deployment on 16 November 1965. This deployment lasted until 31 March 1966, and the squadron again deployed its personnel and planes to Anderson Air Force Base, Guam from 27 June to about 23 December 1967 and between 28 June and 28 December 1968. However, shortly after the squadron's first deployment to support Arc Light, Robert S. McNamara, Secretary of Defense approved a phaseout program that would reduce SAC's bomber force. The program called for the mid-1971 retirement of B-52Cs, and of several subsequent B-52 models. Only a few months after its return from its third deployment, in May 1969, the 454th Wing began focusing on phasing down its operations and transferring Columbus to Air Training Command. The squadron was inactivated on 2 July 1969 with the end of SAC operations at Columbus. Lineage Constituted as the 736th Bombardment Squadron (Heavy) on 14 May 1943 Activated on 1 June 1943 Redesignated 736th Bombardment Squadron, Heavy c. 1944 Redesignated 736th Bombardment Squadron, Very Heavy on 5 August 1945 Inactivated on 17 October 1945 Activated in the reserve on 27