The political doctrine developed during the Cold War is known as containment. This strategy was primarily aimed at preventing the spread of communism beyond its existing borders, particularly in Eastern Europe and Asia. Formulated in response to the Soviet Union's actions, containment involved a series of political, economic, and military measures. Prominent figures like George F. Kennan advocated for this approach, which influenced U.S. foreign policy for decades. The doctrine shaped the dynamics of international relations, leading to various military alliances, proxy wars, and a profound ideological divide between the capitalist West and the communist East.