Aftermath
Eden's resignation marked, until the Falklands War, the last significant attempt Britain made to impose its military will abroad without U.S. support. However, Nigel Ashton argues "that British strategy in the region changed very little in the wake of Suez. Macmillan was every bit as determined as Eden had been to stop Nasser" although he was more willing to enlist American support in the future for that end. Some argue that the crisis also marked the final transfer of power to the new superpowers, the United States and the Soviet Union.
The incident demonstrated the weakness of the NATO alliance in its lack of planning and cooperation beyond the European stage. From the point of view of General de Gaulle, the Suez events demonstrated that France could not rely on allies anymore. Britain withdrew its troops in the midst of the battle without warning its allies. In 1957, following these events, the French government launched an autonomous nuclear programme conducted in the Sahara,[23] known as Force de frappe, as a deterrent not only against the USSR but vis-à-vis every potential threat around the globe. By 1966 de Gaulle withdrew France from the integrated NATO military command. According to the protocol of Sèvres agreements, France secretly transmitted parts of its own atomic technology to Israel, including a detonator.[24]
The imposed end to the crisis signalled the weakening of the United Kingdom and France as Global Powers. Nasser's standing in the Arab world was greatly improved, with his stance helping to promote pan-Arabism and reinforce hostility against Israel and the West. The crisis also arguably hastened the process of decolonization, as the remaining colonies of both Britain and France gained independence over the next several years.
After Suez, Aden and Iraq became the main bases for the British in the region while the French concentrated their forces at Bizerte and Beirut.
UNEF was placed in the Sinai (on Egyptian territory only) with the express purpose of maintaining the cease-fire. While effective in preventing the small-scale warfare that prevailed before 1956 and after 1967, budgetary cutbacks and changing needs had seen the force shrink to 3,378 by 1967. The Egyptian government then began to remilitarize the Sinai, and demanded that the UNEF withdraw. This action, along with the blockade of the Strait of Tiran, led directly to the Six Day War. During the war, Israeli armed forces captured the east bank of the canal, which subsequently became a de facto boundary between Egypt and Israel and the canal was therefore closed until June, 1975.