This book is a study of the origins, development, and end of the U.S.-Soviet Cold War rivalry in Iran from 1945 to 1962 and its influence on the political and economic development of the country. It traces the roots of this rivalry to the Anglo-Soviet occupation of Iran in 1941 during the Second World War that subsequently led to U.S. involvement in Iran in 1942 as part of the Allied war effort. While analyzing the superpower rivalry, the book also focuses on the development of U.S.-Iranian relations and U.S. policy toward Iran, whose primary goal was to keep Iran free from communism. The book traces the development of U.S.-Iranian relations and U.S. policy toward Iran through the Truman, Eisenhower, and Kennedy administrations and examines whether there were any elements of continuity among the three administrations in keeping Iran free from communism. The book also provides an in-depth analysis of the response of the Shah and the Iranian government to foreign-power rivalry in Iran.