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 August 1955. The group was originally activated as the 575th Air Service Group, a support unit for the 4th Fighter Group after the 4th returned to the United States at the end of World War II and performed that mission until it was inactivated in 1947.

The 4708th Air Defense Wing is a discontinued United States Air Force organization. Its last assignment was with the 30th Air Division of Air Defense Command (ADC) at Selfridge Air Force Base (AFB), Michigan, where it was discontinued in 1956. It was established in 1952 at Selfridge as the 4708th Defense Wing in a general reorganization of Air Defense Command (ADC), which replaced wings responsible for a base with wings responsible for a geographical area. It assumed control of several fighter Interceptor squadrons that had been assigned to the 56th Fighter-Interceptor Wing, some of which were Air National Guard squadrons mobilized for the Korean War.