Air Force Systems Command's work-load in electronic systems. Because they were usually technical or highly specialized in nature, named divisions generally had a large number of personnel. One named division of an operational command was the USAF Southern Air Division which absorbed resources of the United States Air Forces Southern Command in 1976, and was part of Tactical Air Command. An air division's numerical identification was usually unique to a major command, however when inactivated, the numerical identification could and was used by a different major command if it was reactivated. During the Cuban Missile Crisis three air divisions, provisional, were organized. Air Force record cards contain the following information: The HQ, Air Division Provisional 1 was organized on 10 Nov 1962 at Homestead AFB, Florida, and assigned to the Air Force Provisional 33 (Fighter Reconnaissance). On 29 Nov 1962, the division was relieved from assignment to Air Force Provisional 33 and assigned directly to Tactical Air Command. At the same time, it was attached to the Air Force Atlantic (ADVON). The HQ, Air Division Provisional 1 was discontinued on 1 June 1963. The HQ, Air Division Provisional 2 was also organized on 10 Nov 1962 at McCoy AFB, Florida, and assigned to AF Prov 33 (Ftr Recon). On 29 Nov 1962, the division was relieved from assignment to AFProv 33 and assigned directly to Tactical Air Command, with attachment to AF Atlantic (ADVON). The division was discontinued on 1 June 1963. The Hq, Air Division Provisional 3 was organized on 25 Oct 1962 at MacDill AFB, Florida, and assigned to AF Prov 33 (Ftr Recon). On 29 Nov 1962, the division was relieved from assignment to 33 AF Prov 33 (Ftr Recon) and assigned directly to Tactical Air Command, with attachment to AF Atlantic (ADVON). On 1 June 1963, the division was discontinued. During the Vietnam War air divisions were commonly used as 'placeholder' organizations when the operational wing at an Air Force Base was deployed to Southeast Asia and commanded the remaining groups and squadrons at a single or multiple Air Force bases. Air divisions were gradually phased out of the Air Force command structure after the end of the Vietnam War, with the numbered air force assuming direct command of its subordinate wings. The last existed into the early 1990s and their usage ended with the 1992 major reorganization of the USAF major commands. Vietnam War In