 Complete the following phrase:  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 