How successful was Americas cold war policy of containment at stopping the spread of communism?

America's Cold War policy of containment was moderately successful in preventing the spread of communism, particularly in Western Europe and parts of Asia. The Marshall Plan and NATO helped stabilize Western Europe and deter Soviet influence, while U.S. involvement in conflicts like the Korean War aimed to contain communism in Asia. However, containment faced challenges, as seen in the spread of communism in Cuba and parts of Southeast Asia, leading to a mixed legacy. Overall, while containment delayed the expansion of communism, it did not eliminate it entirely.