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
Alfred Gruenther of Staff in 1947-1949. In 1949, he was promoted to the rank of lieutenant general and served as the U.S. Army's deputy chief of staff for plans and operations. In 1951, Gruenther was promoted to four-star general and appointed as the Chief of Staff, Supreme Headquarters Allied Powers Europe (COFS SHAPE) under Gen. Eisenhower, who became the Supreme Allied Commander Europe (SACEUR). He continued to serve under Gen. Matthew Ridgway and later replaced him as SACEUR. From 11 July 1953 to 20 November 1956, he was Supreme Allied Commander, Europe/Commander in Chief, U.S. European Command (SACEUR/USCINCEUR). On December 31, 1956,