Fourth Allied Tactical Air Force

Fourth Allied Tactical Air Force (4 ATAF) was a NATO military formation under Allied Air Forces Central Europe tasked with providing air support to NATO's Central Army Group (CENTAG) in the southern portion of West Germany. 4 ATAF commanded all flying units based within its sector and all reinforcements flying into its sector, as well as ground-based radar systems and stations, air defense units and the airfields in its sector.

Source: Wikipedia — Fourth Allied Tactical Air Force (CC BY-SA 4.0)