The United States European Command (EUCOM) is one of the eleven unified combatant commands of the United States military, headquartered in Stuttgart, Germany. Its area of focus covers and 51 countries and territories, including Europe, Russia, and Greenland. The Commander of the United States EUCOM simultaneously serves as the Supreme Allied Commander, Europe (SACEUR) within NATO, a military alliance. During the Gulf War and Operation Northern Watch, EUCOM controlled the forces flying from Incirlik Air Base. History and significant operations Prior to 1952, the title "European Command (EUCOM)" referred to a single-service, United States Army command. The senior U.S. Army administrative command in the European region had previously been designated European Theater of Operations United States Army (ETOUSA) from 8 June 1942 – 1 July 1945; United States Forces European Theater (USFET) from 1 July 1945 – 15 March 1947; and then European Command (EUCOM) 15 March 1947 – 1 August 1952. 1950s The first unified command in the European area was established by the Joint Chiefs of Staff on 1 August 1952. Designated the U.S. European Command (USEUCOM), it was established to provide "unified command and authority" over all U.S. forces in Europe. Prior to 1 August 1952, the U.S. Air Force, U.S. Navy, and U.S. Army presence in Europe maintained separate commands that reported directly to the Joint Chiefs of Staff. The respective titles of the service commands were: Commander-in-Chief, U.S. Air Forces in Europe (USAFE); Commander-in-Chief, U.S. Naval Forces, Eastern Atlantic and Mediterranean; and Commander-in-Chief, U.S. European Command. In line with the creation of the joint-service European Command, the Army command in Europe has redesignated U.S. Army Europe on 1 August 1952. The unified command structure was born of the need to address changes wrought not only by America's rapid post-war demobilization but the end of the occupation of Germany in 1949. Questions arose over the U.S. commitment to the defense of Western Europe against the Soviet Union (USSR). Providing for the common defense was a great concern, especially after the Berlin Crisis of 1948–49 when the Soviet Union blocked access to the divided city and the U.S. and United Kingdom responded with an unprecedented airlift. In 1949 the allies established the North Atlantic Treaty Organization (NATO). In 1952 the area of responsibility included continental Europe, the United Kingdom, North Africa and Turkey. The AOR was subsequently expanded to include Southwest Asia as far east as Iran