What name was given to the u. s. policy of giving military aid to countries to them stop the spread of communism?

Truman Doctrine

Explanation:

The Truman Doctrine was an American policy that stated as its purpose to counter the expansion of communism during the Cold War. During this time period, the United States was engaged in an ideological conflict with the Soviet Union, with their corresponding ideologies (capitalism and communism) being spread all over the world. The doctrine established that the United States would provide financial aid to support the countries that were threatened by the expansion of Soviet communism.