84th Combat Sustainment Group The 84th Combat Sustainment Group is an inactive United States Air Force ( USAF ) group last assigned to the 84th Combat Sustainment Wing at Hill Air Force Base , Utah , where it was inactivated in 2010 . The group was first formed in 1942 as the 84th Bombardment Group , one of the first dive bomber units in the United States Army Air Corps and tested the Vultee Vengeance , proving that aircraft unsuitable as a dive bomber . As an Operational Training Unit , it was the parent for several other bombardment group s , but from 1943 until it was disbanded in 1944 , trained replacement aircrew s as a Replacement Training Unit designated the 84th Fighter - Bomber Group . The group was again active as a fighter group from 1949 to 1951 in the Air Force Reserves , with no equipment of its own , but using that of the Regular 52d Fighter - All Weather Group until it was called to active duty in 1951 and its personnel used to man other units . In 1955 , as part of an Air Defense Command program to revive fighter units that had served in World War II , the group became the 84th Fighter Group ( Air Defense ) and served as the USAF host at Geiger Field and served in an air defense role in the northwestern United States until inactivating in 1963 . The group changed missions again , becoming a logistics unit when activated in 2006 as part of a major reorganization of Air Force Materiel Command ( AFMC ) . It was inactivated in 2010 , when this reorganization was reversed , and AFMC returned to a more traditional organization . History . World War II . Bombardment Group . The group was activated in 1942 as the 84th Bombardment Group ( Light ) at Hunter Field , GA , and equipped with Douglas A - 24 Banshee dive bombers . The 301st , 302d , 303d , and 304th Bombardment Squadrons were assigned . It received its initial cadre and equipment from the 3d Bombardment Group . The group was assigned the first Army Air Forces ( AAF ) squadron expressly designated for dive bombing . It operated briefly with Vultee V - 72 ( A - 31 Vengeance ) aircraft , but its operations showed this aircraft was unsuitable for dive bombing . The group served as the parent for several other light bombardment groups and also trained pilots from Chile . Fighter - Bomber Group . In 1943 , the group was redesignated as the 84th Fighter - Bomber Group as were other AAF single engine bombardment groups , and re - equipped with Republic P - 47 Thunderbolt s . As a result of this redesignation , its squadrons were renumbered as the 496th , 497th , 498th , and 491st Fighter - Bomber Squadrons ( FBS ) , respectively . During World War II , the 84th Group served as an operational training ( OTU ) until October 1943 . The OTU program involved the use of an oversized parent unit to provide cadres to “ satellite groups . ” Afterwards , it became a replacement training unit RTU ) and also participated occasionally in demonstrations and maneuvers . RTUs were also oversized units , but with the mission of training individual pilots or aircrew s . In performing this mission , the group assumed a split operation , with group headquarters and the 491st and 497th FBS remaining at Harding , while the 496th and 498th FBS moved to Hammond Army Air Field , Louisiana in October and November , 1943 and Abilene Army Air Field , Texas in February 1944 . However , the AAF found that standard military units , based on relatively inflexible tables of organization were proving less well adapted to the training mission in the US . Accordingly a more functional system was adopted in which each base was organized into a separate numbered unit . The group was therefore disbanded in April 1944 and replaced at Harding by the 236th AAF Base Unit ( Combat Crew Training School , Fighter ) as the Army Air Forces disbanded its units in the US that were not programmed to be transferred overseas . At the same time , the 261st AAF Base Unit ( Combat Crew Training School , Fighter ) took over the personnel , equipment and mission of the squadrons at Abilene . Cold War . Continental Air Command . The group was reconstituted as the 84th Fighter Group , All Weather and activated in the Air Force Reserves in 1949 to train as a fighter corollary unit of the 52d Fighter Group in the regular Air Force , but was apparently undermanned and thus performed very little training . During its only 2 - week summer encampment ( 12 – 26 June 1950 ) , the group had only four pilots capable of flying the 52d ' s North American F - 82 Twin Mustang s it provided for training the 84th . Units of the 84th Group seem to have been poorly manned , and the parent 52d Fighter - All Weather Wing made little use of its corollary units . The 84th Group was ordered to active service on 1 June 1951 , inactivated the next day , and its few people became " fillers " in other USAF units . Air Defense Command . The group was redesignated the 84th Fighter Group ( Air Defense ) and reactivated in 1955 at Geiger Field , WA to replace the 530th Air Defense Group as part of Air Defense Command ' s Project Arrow , which was designed to bring back on the active list the fighter units which had compiled memorable records in the two world wars . It was assigned the 497th Fighter - Interceptor Squadron ( FIS ) , which moved from Portland International Airport and the newly activated 498th FIS , which took over the equipment and personnel of the inactivating 440th FIS and 520th FIS . Both squadrons flew radar equipped and rocket armed North American F - 86 Sabre s . The group provided air defense of the northwestern US and acted as USAF host organization at Geiger Fld . It was assigned several support organizations to perform these duties . In February 1957 , the 498th FIS upgraded to F - 102 Delta Dagger s , which were equipped with data link for interception control through the Semi - Automatic Ground Environment system . The 497th FIS , however . continued to fly Sabres until it moved to Europe in June 1958 and was reassigned away from the group . In July 1959 , the group again upgraded to F - 106 Delta Dart s . The group was inactivated in 1963 and its combat squadron transferred to McChord AFB , Washington and the 325th Fighter Wing ( Air Defense ) . Modern Era . The group was reactivated in 2005 as a logistics support group at Hill AFB , UT as part of the Air Force Materiel Command ( AFMC ) Transformation , which replaced that command ' s traditional staff agency organizations with wing s and group s . It added component squadrons the following year . The 84th Combat Sustainment Group developed , acquired , and sustained nineteen major command , control , communication , and intelligence systems , space ground segments and presidential telecommunications systems . it served the National Command Authority , the Services , combatant commands , federal agencies , and foreign sales customers . It managed systems valued at over $ 3 . 5B and provided spare parts to for fielded systems worldwide . In 2010 the group was inactivated when AFMC returned to its traditional organization . Lineage . Units assigned . Operational Squadrons Support Units References . Bibliography . Further Reading