Arab world Nejd and Hejaz from 1927 until it was further consolidated with Al-Hasa and Qatif into the Kingdom of Saudi Arabia in 1932. The establishment of the State of Israel in 1948 has given rise to the Arab–Israeli conflict, one of the major unresolved geopolitical conflicts. The Arab states in changing alliances were involved in a number of wars with Israel and its western allies between 1948 and 1973, including the 1948 Arab–Israeli War, the 1956 Suez Crisis, the Six-Day War of 1967, and the Yom Kippur War of 1973. An Egypt–Israel Peace Treaty was signed in 1979. The Iran–Iraq War
Arab–Israeli conflict establishing law and order in Palestine" (Clause 10(e)). Further in Clause 10(e): "The Governments of the Arab States hereby confirm at this stage the view that had been repeatedly declared by them on previous occasions, such as the London Conference and before the United Nations mainly, the only fair and just solution to the problem of Palestine is the creation of United State of Palestine based upon the democratic principles ..." That day, the armies of Egypt, Lebanon, Syria, Jordan and Iraq invaded what had just ceased to be the British Mandate, marking the beginning of the 1948 Arab–Israeli War.