The Korean War began in 1950 when the Soviet Union attacked South Korea. United Nations invaded North Korea. Communist North attacked the non-Communist South. people of Korea rose up against the Japanese.

All were true until an armistice was meted out, permanently partitioning Korea pre-1950 to Communist North Korea in the capital city of Pyongyang, with Democratic South Korea in the capital city of Seoul. A “no fly zone” of demarcation is still occupied today by approximately 5,000 to 10,000 active duty U.S. military personnel along the Southern border, and by an equal number of N. Korean troops on the Northern border. Hope that helps!