Britain attempted to seek aid from the United States under the Truman administration, but the U.S. declined due to a possible conflict that could arise with the Soviet Union. In 1952, the British Secret Intelligence Service (SIS), more commonly known as MI6, constructed a plan for a coup and pressed the U.S. to mount a joint operation to remove the democratically elected government of Prime Minister Mohammad Mosaddeq[15] and install the Shah Mohammed Reza Pahlavi to rule Iran autocratically. Representatives of British intelligence met with newly formed CIA representatives in Washington during November and December 1952 for the purpose of discussing a joint war and stay-behind plans in Iran.