The Six-Day War, also known as the June War, the 1967 Arab–Israeli War or the Third Arab–Israeli War, was an armed conflict fought from 5 to 10 June 1967 between Israel and an Arab coalition primarily comprising Jordan, Syria and UAR Egypt.
Relations between Israel and its Arab neighbours were not normalized after the First Arab–Israeli War in 1948–1949. In 1956, Israel invaded Egypt, triggering the Suez Crisis. Among Israel's rationale for the invasion was its goal of reopening the Straits of Tiran, which had been closed by Egypt for all Israeli shipping since 1950. Israel was eventually forced to withdraw, but was guaranteed that the Straits would remain open. A peacekeeping contingent known as the United Nations Emergency Force was deployed along the Egypt–Israel border, but there was no demilitarization agreement between the two sides.
In the months prior to June 1967, tensions in the region became dangerously heightened. Israel reiterated its post-1956 position that the re-closure of the Straits of Tiran to Israeli shipping would be a definite casus belli.