The Six-Day War was fought between June 5 and June 10, 1967, by Israel and the neighboring states of Egypt [known then as the United Arab Republic (UAR)], Jordan, and Syria. The war began with a large-scale surprise air strike by Israel on Egypt and ended with a major victory by Israel. A number of controversies have arisen out of the causes and conduct of the war, namely: whether Israel's action was a preemptive strike justified by the threat of an imminent attack by the Arab states or an unjustified and unprovoked attack; whether the Egyptians killed stragglers from their own forces as they returned from the defeat; whether the Israelis killed unarmed Egyptian prisoners; and the extent of foreign support given to the combatants in the war.