The Cold War pitted the US and Soviet Union against each other in a global struggle for dominance. Tensions arose from competing ideologies, with the US promoting democracy and capitalism while the USSR advocated for communism and a planned economy. Key events like the Berlin Blockade, Cuban Missile Crisis, and Vietnam War shaped the conflict. The arms race and Space Race fueled technological advancements, while proxy wars and alliances extended the rivalry worldwide. The Cold War's end in 1991 reshaped global politics.