22d Tactical Air Support Training Squadron The 22d Tactical Air Support Training Squadron is an inactive United States Air Force unit . Its last assignment was with the 602d Tactical Air Control Wing , based at Davis - Monthan Air Force Base , Arizona . It was inactivated on 30 September 1991 . It has been in active service for four different occasions , and saw combat service in the early years of World War II and in the Vietnam War . History . World War II . Squadron participated in antisubmarine patrols in the American Theater , January 1942 - August 1943 , and in European Theater , September – November 1943 . Antisubmarine patrol flights were conducted in the squadron ' s assigned areas , producing a situation map that was continuously updated with enemy and friendly forces , convoys , and other pertinent information . The antisubmarine patrols also produced an enemy dispersion chart showing the disposition of all known enemy submarines in the entire Atlantic area . The ground echelon disbanded on 30 October 1943 , and the air echelon disbanded on 11 November 1943 . It briefly served in the European Theater of Operations in September to November 1943 . The ground echelon disbanded on 30 Oct 1943 , and the air echelon disbanded on 11 November 1943 . Vietnam War . The 22d Tactical Air Support Squadron ( Light ) organized at Binh Thuy Air Base , South Vietnam , on 8 May 1965 . It provided aircrews in Vietnam to direct air strikes for tactical aircraft operating within the Tactical Air Control System ( TACS ) . Visual reconnaissance , convoy escort , and other missions were conducted as directed by the Tactical Air Commander , and aircraft and maintenance were provided in support of these operations within IV Corps , Republic of Vietnam , as directed by Seventh Air Force . The squadron provided aircraft and personnel in support of the Theater Indoctrination School , and field and transient maintenance support of USAF aircraft at Binh Thuy Air Base . The 22nd operated the Cessna 0 - 1 aircraft , 1965 – 1971 ; and the Cessna 0 - 2 aircraft , 1967 – 1971 . Personnel and other resources of the 22d were absorbed by the 19th Tactical Air Support Squadron on 15 January 1971 , and the 22d was unmanned and non - operational until it transferred W / O / P / E to Wheeler AFB , Hawaii , on 15 May 1971 . Over the course of the war , the 22nd TASS suffered four killed in action . Aircraft losses were 13 O - 1 Bird Dog s and three Cessna O - 2 Skymaster s . Hawaii service . At Wheeler the 22d , using the Cessna 0 - 2 , organized , trained , and equipped assigned personnel to provide the Air Force Component Commander with a joint force , capable of operating and maintaining a tactical air support subsystem for ground forces requiring close air support , tactical air reconnaissance , and tactical airlift . The squadron also provided Direct Air Support Center and Tactical Air Control Party ( TACP ) personnel and equipment to support US Army units in Hawaii . During 1982 , the 22d participated in a number of exercises and prepared plans for conversion to the OV - 10 . Converted to the OV - 10 aircraft , August – October 1983 . Supported U . S . Army on the ground with TACPs creating a network which provided the Army with immediate air support and , in the air , with OV - 10 forward air control support . Participated in numerous exercises with US and allied army ground units throughout the Far East . It was inactivated on 22 September 1988 . It was then re - designated 22d Tactical Air Support Training Squadron on 1 October 1988 and reactivated on 14 October 1988 . Its final inactivation was on 30 September 1991 .