Anwar Sadat of Nasserism, re-instituting a multi-party system, and launching the Infitah economic policy. As President, he led Egypt in the Yom Kippur War of 1973 to regain Egypt's Sinai Peninsula, which Israel had occupied since the Six-Day War of 1967, making him a hero in Egypt and, for a time, the wider Arab World. Afterwards, he engaged in negotiations with Israel, culminating in the Egypt–Israel Peace Treaty; this won him and Israeli Prime Minister Menachem Begin the Nobel Peace Prize, making Sadat the first Muslim Nobel laureate. Although reaction to the treaty—which resulted in the return of Sinai to Egypt—was generally
Anwar Sadat presidency was widely expected to be short-lived. Viewing him as having been little more than a puppet of the former president, Nasser's supporters in government settled on Sadat as someone they could manipulate easily. Sadat surprised everyone with a series of astute political moves by which he was able to retain the presidency and emerge as a leader in his own right. On 15 May 1971, Sadat announced his "Corrective Revolution", purging the government, political and security establishments of the most ardent Nasserists. Sadat encouraged the emergence of an Islamist movement, which had been suppressed by Nasser. Believing Islamists to