Sinai Peninsula and controlled by foreign empires, in more recent history the Ottoman Empire (1517–1867) and the United Kingdom (1882–1956). Israel invaded and occupied Sinai during the Suez Crisis (known in Egypt as the "Tripartite Aggression" due to the simultaneous coordinated attack by the UK, France and Israel) of 1956, and during the Six-Day War of 1967. On 6 October 1973, Egypt launched the Yom Kippur War to retake the peninsula, which was unsuccessful. In 1982, as a result of the Israel–Egypt Peace Treaty of 1979, Israel withdrew from all of the Sinai Peninsula except the contentious territory of Taba, which was
Suez Crisis Mediterranean and the beginning of the invasion. Additionally, the coming of winter weather to the Mediterranean in late November would render the invasion impossible, which thus meant the invasion had to begin before then. An additional problem was Eden, who constantly interfered with the planning and was so obsessed with secrecy that he refused to tell Keightley what his political objectives were in attacking Egypt, namely was he interested in retaking the Suez Canal or toppling Nasser, or both. Eden's refusal to explain to Keightley just what exactly he was hoping to accomplish by attacking Egypt exasperated Keightley to no