The year 1947 marked the beginning of the Cold War, though tensions between the United States and the Soviet Union had been simmering since the end of World War II. The situation escalated with the introduction of the Truman Doctrine and the Marshall Plan, aimed at containing communism and providing aid to war-torn European nations. This era was characterized by ideological, political, and military rivalry, leading to significant events such as the Korean War, Cuban Missile Crisis, and the Vietnam War. The Cold War fundamentally shaped global relations, military strategies, and national policies for decades.