Soviet presence in Iran began in 1942 when Iran signed an agreement allowing British and Soviet troops to enter the country to defend its oil fields against a possible German attack. The treaty contained a specific provision that required all foreign troops to exit Iran within six months from the end of the war, but the Soviets remained past the withdrawal deadline.
Harry S. Truman's election signaled the beginning of a more hostile
American foreign policy towards the Soviet Union. In an attempt to contain the spread of Soviet influence, the United States brought the matter to the United Nations in the form of a formal complaint. == Aftermath ==