 Complete the following phrase:  In his eleven years as president, he changed Egypts trajectory, departing from many of the political and economic tenets 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 Egypts 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 EgyptIsrael Peace Treaty; this won him and Menachem Begin the Nobel Peace Prize, making Sadat the first Muslim Nobel laureate. Although reaction to the treatywhich resulted in the return of Sinai to Egyptwas generally favorable among Egyptians, it was rejected by the countrys Muslim Brotherhood and the left, which felt Sadat had abandoned efforts to ensure a Palestinian state. With the exception of Sudan, the Arab world and the Palestine Liberation Organization PLO strongly opposed Sadats efforts to make a separate peace with Israel without prior consultations with the Arab states. His refusal to reconcile with them over the Palestinian issue resulted in Egypt being suspended from the Arab League from 1979 to 1989. The peace treaty was also one of the primary factors that led to 