The term 'East vs. West' refers to the ideological, political, and cultural divide that emerged during the Cold War, primarily between the United States and its allies in the West and the Soviet Union and its satellite states in the East. This division was characterized by contrasting beliefs in capitalism and democracy on one side, against communism and authoritarianism on the other. The tensions from this divide shaped international relations, military strategies, and domestic policies during the latter half of the 20th century.