On June 25, 1950, North Korea invaded South Korea, which was the beginning of the Korean War. For the next three years, the two countries fought bloody battles, North Korea with the help of China, South Korea aided by the United States heading a United Nations force with more than 10 other countries. As the war progressed, the border between the two Koreas moved back and forth, so to speak, depending on which side was winning at the time. When the war ended, the border practically went back to its original location.
