The document summarizes the origins and key events of the Korean War from 1950-1953. It began when North Korea invaded South Korea in June 1950, capturing Seoul within days. UN forces led by the US pushed the North Koreans back before China entered the war in late 1950, driving UN troops back below the 38th parallel. An armistice in 1953 established the demilitarized zone along the border, dividing Korea. Over 2 million military and civilians were killed in the conflict.