<human>:  What is the history of the Korean War?
<bot>: The Korean War was a conflict between North Korea, backed by China and the Soviet Union, and South Korea, backed by the United Nations with majority support from the United States. It started on June 25, 1950 and ended with the signing of an armistice on July 27, 1953. During the war, over 3 million people were killed, including 1.2 million military personnel and 2 million civilians. A demilitarized zone was established to separate the two countries and an uneasy peace has continued since then.