The Supreme Allied Commander Europe (SACEUR) is the commander of the North Atlantic Treaty Organization's (NATO) Allied Command Operations (ACO) and head of ACO's headquarters, Supreme Headquarters Allied Powers Europe (SHAPE). The commander is based at SHAPE in Casteau, Belgium. Effectively SACEUR is the second-highest military position within NATO, below only the Chair of the NATO Military Committee in terms of precedence. There is another Supreme Allied Commander in NATO, Supreme Allied Commander Transformation (SACT), titularly equal, but their duties are less important. SACT, in Norfolk, Virginia, has responsibility for capability development, rather than operations. SACEUR has always been held by a U.S. military officer, and the position is dual-hatted with that of Commander of United States European Command. The current SACEUR is General Christopher G. Cavoli of the United States Army. Source: Wikipedia (en)