Korean War Poster featuring an image of 16-inche salvo from the USS Missouri at Chong Jin, Korea, in effort to cut Northern Korean communications. Chong Jin is only 39 miles from the border of China. October 21, 1950. (Navy)
The Korean War, 25 June 1950 – 27 July 1953) began when North Korea invaded South Korea. The United Nations, with the United States as the principal force, came to the aid of South Korea. China came to the aid of North Korea, and the Soviet Union gave some assistance.