575th Air Defense Group
575th Air Defense Group
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| Active | 1946-1947; 1953–1955 |
| Country |
 United States
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| Branch |
 United States Air Force
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| Type | Fighter Interceptor |
| Role | Air Defense |
| Part of | Air Defense Command |
The 575th Air Defense Group is a disbanded United States Air Force organization. Its last assignment was with the 4708th Air Defense Wing at Selfridge Air Force Base, Michigan, where it was inactivated in 1955. The group was originally activated as a support unit for the 4th Fighter Group after the 4th returned to the US at the end of World War II and performed that mission until it was inactivated in 1947.
The group was activated once again in 1952 to replace the support elements of the inactivating 56th Fighter-Interceptor Wing. A year later ADC established it as an operational headquarters for fighter-interceptor squadrons as well. It was replaced in 1955 when ADC transferred its mission, equipment, and personnel to the 1st Fighter Group in a project that replaced air defense groups commanding fighter squadrons with fighter groups with distinguished records during World War II.
The group was activated in 1946 as the 575th Air Service Group to support the 4th Fighter Group at Selfridge Field, Michigan. Its 1044th Air Engineering Squadron provided maintenance that was beyond the capability of the fighter group, its 1054th Air Materiel Squadron handled all supply matters, and its Headquarters & Base Services Squadron provided other support. The group transferred to Andrews Field, Maryland, where it was inactivated in August 1947 and its personnel and equipment were transferred to the 4th Airdrome Group, which assumed its mission under the experimental wing base reorganization. It was disbanded in October 1948.
The group was reconstituted, redesignated as the 575th Air Base Group, and activated at Selfridge in 1952 in a major reorganization of Air Defense Command (ADC) responding to ADC's difficulty under the existing wing base organizational structure in deploying fighter squadrons to best advantage. It replaced the 56th Air Base Group as the USAF host unit for Selfridge. The group was assigned seven squadrons to perform its support responsibilities. It also maintained aircraft stationed at Selfridge.
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