Allied Command Operations (ACO) is one of The
North Atlantic Treaty Organization's (NATO) two strategic military
commands. ACO is commanded by the Supreme Allied Commander Europe
(SACEUR) and is responsible for all Alliance military operations. The
command headquarters, known as the Supreme Headquarters Allied Powers
Europe, or SHAPE, is located in Casteau near Mons, Belgium.
The mission of ACO and the SACEUR is to contribute to preserving
the peace, security and territorial integrity of NATO member nations in
its area of responsibility.