sentences:  This happened in 1956 and again in 1967, when Egypt's closure of the Straits of Tiran to Israeli shipping effectively blockaded the port of Eilat.In 1956, this led to Israel's participation alongside Britain and France in the war against Egypt sparked by the Suez Crisis, while in 1967 90% of Israeli oil passed through the Straits of Tiran.Oil tankers that were due to pass through the straits were delayed.