would collapse to the North Vietnamese backed forces. Withdrawal The American withdrawal from South Vietnam began to directly affect SOG in 1971. By early 1972 U.S. military personnel were forbidden from conducting operations in either Laos or Cambodia, its teams of mercenary SCUs continued those operations (in the newly renamed Phu Dung/Prairie Fire and Thot Not/Salem House areas). The organization did, however, maintain its strength in U.S. personnel, who continued to conduct in-country missions. It was also continuously tasked by the JCS with maintaining forces in readiness to once again take up northern operations if called upon to do so. The Easter Offensive, launched by the PAVN on 30 March 1972, made cross-border operations irrelevant. As with Tet, all of MACV-SOG/STD's efforts were concentrated on in-country missions to support the Field Forces. In late March 1971, when the 5th Special Force Group was redeployed to the U.S., the Command and Control elements were renamed Task Force Advisory Elements (TF1AE, TF2AE and TF3AE). They originally consisted of 244 U.S. and 780 indigenous personnel each, but they were quickly drawn down by the elimination of the exploitation forces. For SOG, Vietnamization was finally nigh. On 1 May 1972, the unit was reduced in strength and renamed the Strategic Technical Directorate Assistance Team 158 (STDAT-158). The Ground Studies Group was disestablished and replaced by the Liaison Service Advisory Detachments. SOG's air elements stood down for redeployment, the JPRC was turned over to MACV and redesignated the Joint Casualty Resolution Center, while the psychological operations personnel and installations were turned over to either the STD or JUSPAO. The final casualty of SOG ground operations occurred on 11 October 1971 when Sergeant First Class Audley D. Mills was killed when a booby-trap he was trying to disarm detonated. The function of STDAT-158 was to assist the STD in a complete takeover of SOG's operations. The operational elements had already been absorbed and were expanded by the inclusion of troops from the now-disbanded South Vietnamese Special Forces. The task of the American personnel was to provide technical support (in logistics, communications, etc.) and advice to the STD. This the unit did until its disbandment on 12 March 1973. The South Vietnamese Joint General Staff, strapped for cash and equipment in the final stand-down period, never used the STD in a strategic reconnaissance role. Instead, the STD's units were launched on in-country missions until the dissolution of