The U.S. used the Truman Doctrine to help avoid communism in which countries?

The Truman Doctrine was primarily aimed at containing communism in Greece and Turkey during the late 1940s. The U.S. provided military and economic assistance to these countries to prevent them from falling under Soviet influence, as both were facing threats from communist insurgents and political instability. This policy marked a significant shift in U.S. foreign policy, committing the U.S. to support free peoples resisting subjugation by armed minorities or outside pressures.