hdraw all their troops from Egypt, except those necessary to protect the Suez Canal and its surroundings. Following World War II, Egypt denounced the Treaty of 1936, leading to skirmishes with British troops guarding the Canal in 1951.
The Egyptian Revolution of 1952 occurred. Then in 1956 President Nasser nationalised the Suez Canal Company. The nationalisation escalated tension with Britain and France, who colluded with Israel to invade Egypt, the invasion known in Egypt as the tripartite aggression or the Suez Crisis. The main battles occurred in Port Said, which played a historic role in resisting the tripartite aggression that failed to achieve any of its objectives. The withdrawal of the last soldier of foreign troops was on the 23rd of December 1956. Since then, this day was chosen as Port Said's national day. It is widely celebrated annually in the valiant city.
After the 1967 Arab-Israeli war, also called the Six Day War, the Suez Canal was closed by an Egyptian blockade until 5 June 1975, and the residents of Port Said were evacuated by the Egyptian government to prepare for the Yom Kippur War (1973). The city was re-inhabited after the war and the reopening of the Canal. In 1976, Port Said was declared a duty-free port, attracting people from all over Egypt. Now the population of the city is 603,787
