Supreme Headquarters Allied Powers Europe Supreme Headquarters Allied Powers Europe Supreme Headquarters Allied Powers Europe (SHAPE) is the headquarters of the North Atlantic Treaty Organization's Allied Command Operations (ACO). SHAPE is located at Casteau, north of the Belgian city of Mons. The commander of ACO and SHAPE is Supreme Allied Commander Europe (SACEUR), a U.S. four-star general officer or flag officer who also serves as Commander, U.S. European Command. Since 1967 it has been located at Casteau, north of the Belgian city of Mons, but it had previously been located, from 1953, at Rocquencourt, next to Versailles, France. From 1951 to 2003, SHAPE was the
Supreme Headquarters Allied Powers Europe countries, including Poland and the Baltic states. In 2003, a French flag was set up in the SHAPE headquarters in Mons following the return, after almost forty years, of French military officers to the HQ. Fifteen French military officers, including General Jean-Jacques Bart, work there, of a total amount of 1,100 personnel. They are however considered as "inserted," and not as "integrated," as they cannot be ordered to move without previous French approval. A new structure was developed with three main headquarters under Allied Command Operations: Between 2003 and 2006, a new category of forces was created, principally to improve