The war that resulted from the ideological conflict between the USSR and the USA is known as the Cold War. This prolonged period of tension and hostility began after World War II and lasted until the early 1990s. The fundamental ideological divide was between the communist principles of the Soviet Union and the capitalist principles of the United States. This conflict encompassed a range of proxy wars, nuclear arms races, and significant geopolitical rivalries without direct military confrontation between the two superpowers. Events such as the Cuban Missile Crisis and the Vietnam War highlighted the Cold War's global impact.