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 were turned from bitter enemies into fast friends. The relationship between Cairo and Tehran became so friendly that the Shah of Iran, Mohammad Reza Pahlavi, called Sadat his "dear brother". After the 1973 war with Israel, Iran assumed a leading role in cleaning up and reactivating the blocked Suez Canal with heavy investment. The country also facilitated the withdrawal of Israel from the occupied Sinai Peninsula by promising to substitute the loss of the oil to the Israelis with free Iranian oil if they withdrew from the Egyptian oil wells in western Sinai. All these added more to the personal