Muhammad Anwar Al Sadat, or Anwar El Sadat (Arabic: محمد أنور السادات‎, Muḥammad Anwar as-Sādāt) (25 December 1918 - 6 October 1981), was the third President of Egypt, serving from 15 October 1970 until his assassination on 6 October 1981. He was a senior member of the Free Officers group that overthrew the Muhammad Ali Dynasty in the Egyptian Revolution of 1952, and a close confidant of Gamal Abdel Nasser, whom he succeeded as President in 1970. In his eleven years as president he changed Egypt's direction, departing from some of the economic and political principles of Nasserism by reinstituting the multi-party system and launching the Infitah. His leadership in the October War of 1973 and the regaining of Sinai made him an Egyptian hero. His visit to Israel and the eventual Israel-Egypt Peace Treaty won him the Peace Abbey Courage of Conscience award posthumously,but was an act enormously unpopular with the Arab world and Islamists, and resulted in Egypt being expelled from the Arab League.