Final answer:
The Truman Doctrine aimed to stop the spread of communism by providing assistance to countries threatened by Soviet expansion.
Step-by-step explanation:
The number-one goal of the Truman Doctrine was to stop the spread of communism.
Following World War II, the Soviet Union sought to expand its influence in Eastern Europe. In response, President Harry Truman announced the Truman Doctrine in 1947, which aimed to contain the spread of communism by providing economic and military assistance to countries threatened by Soviet expansion. For example, the United States provided support to Greece and Turkey to prevent them from falling under communist control.
By implementing the Truman Doctrine, the United States was able to counter the Soviet Union's efforts and prevent further communist expansion, marking a significant shift in U.S. foreign policy during the Cold War.
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