Suez/Sinai War info:
"As part of Egyptian President Nasser's nationalist agenda, he took control of the Suez Canal zone away from the British and French companies which owned it. At the same time, as part of his ongoing struggle with Israel, Egyptian forces blocked the Straits of Tiran, the narrow waterway that is Israel's only outlet to the Red Sea. Israel and Egypt had clashed repeatedly since their 1948 war as Egypt allowed and encouraged groups of Palestinian fighters to attack Israel from Egyptian territory. In response, Israeli forces constantly made cross-border raids in retaliation. Britain and France, both of whom were in the process of losing their centuries-old empires, decided on a strategy straight our of their 19th Century Imperial histories. This plan led to a joint invasion and occupation of the Suez Canal zone by Britain and France. This was meant to reassert control of this vital waterway to the British and French companies stung by Nasser's bold nationalization. At France's suggestion, planning was coordinated with Israel, a fact which all three nations denied for years afterwards. "
http://www.historyguy.com/suez_war_1956.html
http://www.historyguy.com/arab_israeli_wars.html
fyi: Israel was invaded by six arab countries right after the UN named it a country in 1948.