In May 1967, Egypt closed the Gulf of Aqaba to Israeli shipping and began mobilizing its forces to attack Israel. Syria and Jordan also mobilized against Israel. In response, Israel launched a strike. Starting June 5, the Israeli air force destroyed Egypt's planes on the ground. Enabled by air superiority throughout the region, Israeli tank columns and infantry captured the Sinai Peninsula in three days. Elsewhere, the Israelis overran the Golan Heights, the West Bank of the Jordan River, including the Old City of Jerusalem (which Israel later annexed), and Gaza. The war was over by June 10, ended by a U.N.-arranged cease-fire. The United States called on the Israelis to withdraw from occupied territories but did not specify how much land it should give up.