Supreme Headquarters Allied Powers Europe (SHAPE) near Mons, Belgium, is the Headquarters of Allied Command Operations (ACO), one of NATO's two strategic military commands. ACO performs the operational duties previously undertaken by Allied Command Europe and Allied Command Atlantic. The latter has now become Allied Command Transformation (ACT) headquartered in Norfolk, Virginia. Commanded by Supreme Allied Commander Transformation (SACT), it is responsible for promoting and overseeing the continuing transformation of Alliance forces and capabilities, especially through training and development of concepts and doctrine
ACO is commanded by the Supreme Allied Commander Europe (SACEUR) and is responsible for all Alliance military operations.