Abstract
The decolonization process in the 1940s and 1950s in Middle Eastern states under Great Britain's informal influence did not aim at recognizing the same type of independence of these states as that enjoyed by Britain and the United States. In the 1940s Washington laid the groundwork for its leading role in Iran during and following the Iranian oil crisis, whilst London with the assistance of the Americans in part reasserted British influence after the crisis. The United States achieved a paramount position in Iran with the assistance of its oil companies and through cooperation with Great Britain, and at the expense of the latter and the Soviet Union.