Ominous skies above the Korean War Monument, located outside the War Memorial of Korea in Yongsan-dong, Seoul, South Korea. From 1950 to 1953 the Korean War was fought between North and South Korea. The war involved a United Nations force led by the USA fighting for the the South against a Chinese and Soviet Union backed North. Fighting ended on 27 July 1953, when an armistice was signed. The agreement created the Korean Demilitarized Zone, 55km North of Seoul, to separate North and South Korea. No peace treaty was subsequently signed, and the two Koreas are technically still at war. Periodic clashes, many of which have resulted in casualties, continue to this day.