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
Northern Army Group and thus ended a conquest of Western Europe by the Huns. In the NATO command structure NORTHAG belonged to Allied Forces Central Europe (AFCENT), which in turn reported to Supreme Headquarters Allied Powers Europe (SHAPE). NORTHAGs responsibility was the defense of the North German plains from south of the river Elbe to the city of Kassel. The defense north of the Elbe was the task of Allied Land Forces Command Schleswig-Holstein and Jutland (COMLANDJUT), while south of Kassel it was the task of CENTAG. Commander in Chief of NORTHAG was the commanding General of the British Army of the Rhine