Why cold war started

The Cold War was the geopolitical, ideological, and economic struggle between two world superpowers, the USA and the USSR, that started in 1947 at the end of the Second World War and lasted until the dissolution of the Soviet Union on December 26, 1991.

The Cold War was marked by continuous rivalry between the two former World War II allies.  Conflict spanned from subtle espionage in the biggest cities of the world to violent combat in the tropical jungles of Vietnam.  It ranged from nuclear submarines gliding noiselessly through the depths of the oceans to the most technologically-advanced satellites in geosynchronous orbits in space.  In basketball and hockey, in ballet and the arts, from the Berlin Wall to the movies. the political and cultural war waged by Communists and Capitalists was a colossal confrontation on a scale never before seen in human history.