The Suez Crisis was an armed conflict fought by Israel, England and France against the nation of Egypt between October 1956 and March 1957. The conflict was a result of Egyptian President Gamal Abdel Nasser's announcement on July 26, 1956, that his country was taking over the Suez Canal Company, a British and French company that had owned the canal since it was built in 1869.
Although Egypt officially nationalized the Suez Canal in July, the Suez Crisis didn't begin in earnest until October 26, 1956, when Israel attacked Egypt. The Israeli military was joined by forces from England and France two days later, although the original plans were for all three countries to attack in unison.
The British and French militaries achieved their goals and gained control of the Suez Canal in a short time, which immediately drew threats from the Soviet Union. The USSR was already an ally of Egypt, and this led them to threaten Western Europe with nuclear strikes if all troops weren't immediately withdrawn from Egypt.
Under pressure from the United States, both France and England agreed to accept a ceasefire agreement from the United Nations in November 1956, and they withdrew all of their troops from Egypt by December. However, it wasn't until March of the following year that Israel finally followed suit and removed their troops to finally put an end to the Suez Crisis.