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 21,000,000 square miles (54,000,000 km2) and 51 countries and territories, including Europe, the Caucasus, Russia. 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.