http://en.wikipedia.org/wiki/Six-Day_War

The Six-Day War (Hebrew: מלחמת ששת הימים transliteration: Milhemet Sheshet Hayamim), also known as the 1967 Arab-Israeli War, Six Days' War, or June War, was fought between Israel and its Arab neighbors Egypt, Jordan, and Syria. It began when Israel launched what it considered a pre-emptive attack against Egypt, following the latter's closure of the Straits of Tiran to Israeli shipping and the deployment of troops in the Sinai near the Israeli border, and after months of increasingly tense border incidents and diplomatic crises. By its end Israel controlled the Gaza Strip, the Sinai Peninsula, the West Bank, and the Golan Heights. The results of the war affect the geopolitics of the region to this day.