Alliance: An alliance is a formal agreement between two or more countries to cooperate and support each other, often in matters of defense.
Cold War: The Cold War was a period of political tension and rivalry between the United States and the Soviet Union after World War II, characterized by ideological conflict rather than direct military confrontation.
Containment: Containment was a U.S. foreign policy strategy during the Cold War that aimed to prevent the spread of communism by providing economic, political, and military assistance to countries threatened by communist expansion.