519th Air Defense Group

The 519th Air Defense Group was a United States Air Force organization that existed in two principal forms: first as the 519th Air Service Group during the final months of World War II and the immediate postwar period, and later as the 519th Air Defense Group during the early Cold War. It was not a commercial brand, but a military organizational designation within the United States Army Air Forces and, subsequently, the United States Air Force. The unit was initially constituted as the 519th Air Service Group and activated in Italy on 20 January 1945. Its purpose was to provide specialized maintenance, supply, medical, administrative, and base-support services to the 485th Bombardment Group. This arrangement reflected a late-war reorganization of Army Air Forces support formations. Rather than combining personnel from several Army branches in a broad service group, the revised structure assigned specialized Air Corps support elements to individual combat groups. The 519th's principal components included the 945th Air Engineering Squadron, the 769th Air Materiel Squadron, and a Headquarters and Base Services Squadron. After the war in Europe ended, the unit returned to the United States and continued supporting heavy-bomber formations. A proposed overseas movement in 1946 was cancelled. The group briefly fell to a very small nominal strength before being re-manned and deployed to Alaska with the 97th Bombardment Group. In 1947, the Air Force's wing-base reorganization, commonly associated with the Hobson Plan, replaced the group with separate airdrome, maintenance and supply, and station medical organizations. The 519th Air Service Group was inactivated on 1 December 1947 and disbanded in 1948. The designation was revived during the Cold War. Reconstituted and redesignated as the 519th Air Defense Group on 21 January 1953, it was activated at Suffolk County Air Force Base, New York, on 16 February of that year. Assigned to the 4709th Defense Wing, later the 4709th Air Defense Wing, the group served as the host and operational-support organization for fighter-interceptor forces defending the northeastern United States. Its responsibilities included coordinating fighter operations and providing the maintenance, medical, administrative, and base services required by its assigned squadrons. At activation, the group assumed responsibility for the 45th and 75th Fighter-Interceptor Squadrons, which operated North American F-86 Sabre variants. The 331st Fighter-Interceptor Squadron was activated shortly afterward and assigned to the group. The 331st operated a radar-equipped, rocket-armed version of the Sabre, while the 75th later transitioned to an improved radar-equipped Sabre model. The 45th Fighter-Interceptor Squadron departed for Morocco in May 1953 and was reassigned away from the group. The 519th Air Defense Group was inactivated on 18 August 1955 as part of Air Defense Command's Project Arrow. That program sought to restore active status to fighter units with distinguished records in the two world wars. Under the reorganization, the 52d Fighter Group assumed the 519th's mission, equipment, personnel, and related responsibilities. The 519th designation was formally disbanded again on 27 September 1984. Its historical significance lies in its role as a transitional support and air-defense formation during the changing organizational systems of the postwar United States military.

The 519th Air Defense Group traces its lineage to the 519th Air Service Group, which was constituted and activated in Italy on 20 January 1945 during the final phase of World War II. The unit was created as part of an Army Air Forces effort to reorganize combat-support formations. Its mission was to serve one combat group—in this case, the 485th Bombardment Group—by supplying specialized functions that the bomber organization could not perform internally. The group's 945th Air Engineering Squadron handled higher-level aircraft maintenance, the 769th Air Materiel Squadron managed supply activities, and the Headquarters and Base Services Squadron provided additional administrative and installation support. The unit was stationed at Venosa Airfield until the end of hostilities in Europe, then moved to Capodichino Airport near Naples. It returned to the United States in May 1945 and continued its association with heavy-bomber forces. The group was scheduled for another overseas movement in 1946, but that deployment was cancelled. In March of that year it was reduced to a small cadre of four officers and seven enlisted personnel, then re-manned in April. It subsequently deployed to Alaska with the 97th Bombardment Group, operating from Mile 26 Field after earlier service at Sioux City Army Air Base and Salina Army Air Field. The Air Force's 1947 wing-base reorganization changed the way installations and combat units were administered. Separate organizations took over the airdrome, maintenance and supply, and medical functions previously associated with the 519th Air Service Group. The group was inactivated on 1 December 1947 and disbanded on 8 October 1948. The organization was revived in response to the requirements of the Cold War. On 21 January 1953, it was reconstituted and redesignated the 519th Air Defense Group; it was activated at Suffolk County Air Force Base, New York, on 16 February. The group was assigned to the 4709th Defense Wing, later renamed the 4709th Air Defense Wing, and replaced the 77th Air Base Squadron as the United States Air Force host organization at Suffolk County. Its Cold War structure combined an operational fighter-interceptor mission with the support functions needed to sustain that mission. The group initially included the 45th and 75th Fighter-Interceptor Squadrons, both flying North American F-86 Sabres. Eight days after the group's activation, the 331st Fighter-Interceptor Squadron was activated and assigned to it. The 331st used a radar-equipped Sabre armed with unguided Mighty Mouse rockets, while the 75th later upgraded to an improved radar-equipped Sabre. The 45th Fighter-Interceptor Squadron moved to Morocco in May 1953 and left the group's command structure. The group remained at Suffolk County until 18 August 1955. Its inactivation resulted from Project Arrow, an Air Defense Command initiative intended to place historically distinguished fighter organizations back on the active list. The 52d Fighter Group assumed the 519th's air-defense mission, equipment, and personnel. Although the operational organization ended in 1955, the 519th designation remained in Air Force lineage records until it was disbanded on 27 September 1984. The unit's history illustrates the postwar shift from World War II bomber-support formations to geographically organized Cold War interceptor defenses.

• 1984

  Final disbandment

  [1]519th Air Defense Groupen.wikipedia.org

  The 519th Air Defense Group was formally disbanded on 27 September.

• 1955

  Replaced by the 52d Fighter Group

  [1]519th Air Defense Groupen.wikipedia.org

  The group was inactivated on 18 August under Project Arrow, with its mission, equipment, and personnel transferred to the 52d Fighter Group.

• 1953

  Reactivated as the 519th Air Defense Group

  [1]519th Air Defense Groupen.wikipedia.org

  The designation was reconstituted and redesignated on 21 January, then activated at Suffolk County Air Force Base on 16 February to support northeastern air defense.

• 1953

  331st Fighter-Interceptor Squadron assigned

  [1]519th Air Defense Groupen.wikipedia.org

  The 331st Fighter-Interceptor Squadron was activated shortly after the group and assigned to it, operating a radar-equipped and rocket-armed F-86 variant.

• 1947

  Inactivated during the wing-base reorganization

  [1]519th Air Defense Groupen.wikipedia.org

  The 519th Air Service Group was replaced by separate installation, maintenance and supply, and medical organizations under the Air Force's reorganization plan.

• 1946

  Re-manned and deployed to Alaska

  [1]519th Air Defense Groupen.wikipedia.org

  Following a period at reduced strength and a cancelled overseas movement, the group was re-manned and deployed to Alaska with the 97th Bombardment Group.

• 1945

  Constituted as the 519th Air Service Group

  [1]519th Air Defense Groupen.wikipedia.org

  The organization was constituted and activated in Italy on 20 January to support the 485th Bombardment Group during the final phase of World War II.

• 1945

  Returned to the United States

  [1]519th Air Defense Groupen.wikipedia.org

  After the end of the European war, the group moved through Naples and returned to the United States, continuing to support heavy-bomber units.

A United States military support and air-defense organization rather than a commercial brand. During its Cold War activation, it functioned as a host and command-support group for fighter-interceptor squadrons assigned to the defense of the northeastern United States.

• 1955

  Project Arrow transfer to the 52d Fighter GroupStrategy

  Background

  Air Defense Command's Project Arrow aimed to restore fighter organizations with distinguished wartime records to active status.

  Action taken

  The 519th Air Defense Group was inactivated and its operational responsibilities, equipment, and personnel were transferred to the 52d Fighter Group.

  Aftermath

  The 52d Fighter Group replaced the 519th at Suffolk County, ending the group's Cold War operational existence.

  Source

• 1947

  Replacement under the wing-base reorganizationStrategy

  Background

  The United States Air Force sought to consolidate installation command and separate base-support functions from the earlier combat-group support structure.

  Action taken

  The 519th Air Service Group was replaced by separate airdrome, maintenance and supply, and station medical organizations.

  Aftermath

  The group was inactivated in December 1947 and later disbanded.

  Source

1. 1519th Air Defense Groupen.wikipedia.org