What was the united States policy known as containment?

Containment was a U.S. foreign policy strategy developed during the Cold War aimed at preventing the spread of communism beyond its existing borders. Initiated under President Harry S. Truman, it sought to counter Soviet influence globally through military, economic, and diplomatic means. Key components included the Truman Doctrine, which provided support to countries resisting communism, and initiatives like the Marshall Plan to rebuild war-torn Europe. Overall, containment shaped U.S. interactions in various conflicts and alliances throughout the Cold War period.