The Northern Army Group (NORTHAG) was a NATO military formation comprising four Western European Army Corps, during the Cold War as part of NATO's forward defence in western Germany.

Second Allied Tactical Air Force was a NATO military formation under Allied Air Forces Central Europe tasked with providing air support to NATO's Northern Army Group (NORTHAG). 2 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.