What policy did the Truman doctoring support?

The Truman Doctrine, articulated in 1947, aimed to contain the spread of communism by providing political, military, and economic assistance to countries resisting Soviet influence. Initially focused on Greece and Turkey, the doctrine signified a shift in U.S. foreign policy towards a proactive stance in global conflicts associated with communism. It set the foundation for American involvement in various international conflicts during the Cold War era.