The Middle East, where combatants were generally not firmly aligned with the superpowers, who mainly sought stability in the crucial oil-producing region, was the most visible location of UN peacekeeping during the Cold War. In 1958, UNOGIL was authorized to ensure that there was no illegal infiltration of personnel or supply of arms across the Lebanese borders, mainly from the United Arab Republic. A few years later, the Yemen Observer Mission (UNYOM), authorized in 1963, attempted to end civil war in Yemen with sides supported by regional rivals Egypt and Saudi Arabia. Throughout the 1970s, the UN also authorized several peacekeeping missions to attempt to calm the Arab–Israeli conflict, in Suez (UNEF II) in 1973 and in the Golan Heights (UNDOF) in 1974 concluding the Yom Kippur War, and Lebanon (UNIFIL) in 1978 following the 1978 South Lebanon conflict. In the 1980s only one new mission was authorized in the region, UNIIMOG, to supervise the withdrawal of troops to the internationally recognized border between Iraq and Iran after almost eight years of war between those two countries.