COLD WAR

explain what the cold war was about.who was involved.
The Cold War was the continuing state of conflict, tension, and competition that existed after World War II between the Soviet Union and its satellites and the powers of the Western world under the leadership of the United States from the mid-1940s to the early 1990s.
Soviet Union + its satellites (e.g. Eastern Europe)
vs
United States + Western World (e.g. Western Europe)
why did it start?
Throughout this period, the conflict was expressed through military coalitions, espionage, weapons development, invasions, propaganda, and competitive technological development, which included the space race. The conflict included costly defense spending, a massive conventional and nuclear arms race, and numerous proxy wars; the two superpowers never fought one another directly.
what was one event which happened during the cold war?
Korean War - refers to a period of military conflict between North Korea (officially the Democratic People's Republic of Korea) and South Korea (officially the Republic of Korea) with major hostilities beginning on June 25, 1950, pausing with an armistice signed on July 27, 1953. North Korea has since unilaterally withdrawn from that armistice, having announced its intent to do so on May 27, 2009