What was the policy of containment trying to do and where was it applied in the early cold war?

The policy of containment aimed to prevent the spread of communism beyond its existing borders, primarily in response to Soviet expansionism during the early Cold War. This strategy was applied in various regions, notably in Europe with initiatives like the Marshall Plan and the establishment of NATO, as well as in Asia, particularly through American involvement in the Korean War. By containing communism, the U.S. sought to stabilize nations susceptible to Soviet influence and maintain a balance of power.