Answer: The policy that the United States implemented to limit the spread of communism during the Cold War was known as containment.
Explanation: The containment policy aimed to prevent the expansion of Soviet influence and communist ideology beyond its existing boundaries. It involved various strategies such as providing economic and military aid to countries threatened by communism, supporting anti-communist governments, engaging in military interventions, and forming alliances such as NATO (North Atlantic Treaty Organization). The goal was to contain and restrict the spread of communism, primarily influenced by the Soviet Union, and protect the interests of the United States and its allies.