What was the Truman issued in response to the?

The Truman Doctrine was issued in 1947 in response to the perceived threat of communism, particularly in Greece and Turkey. It aimed to provide political, military, and economic assistance to countries resisting communist influence. This policy marked a significant shift in U.S. foreign policy, committing the United States to a strategy of containment to prevent the spread of communism worldwide. The doctrine effectively laid the groundwork for American involvement in various conflicts during the Cold War.