A war fought in 1967 by Israel on one side and Egypt, Syria, and Jordan on the other. Israel, victorious, took over the Golan Heights, the Jordanian portion of Jerusalem, the Jordanian West Bank of the Jordan River, and a large piece of territory in northeastern Egypt, including the Sinai Peninsula, which contains Mount Sinai. Israel still occupies all of these territories except the Sinai Peninsula, which it gave back to Egypt in 1982. Israel maintains that its security would be enormously endangered if it withdrew from the other places.