First US Troops to Korea 6-28-1950. Thank you Korean War Vets.

The Korean War 25 June 1950 – 27 July 1953 was a war between the Republic of Korea (supported primarily by the United States of America, with contributions from allied nations under the aegis of the United Nations) and the Democratic People's Republic of Korea (supported by the People's Republic of China, with military and material aid from the Union of Soviet Socialist Republics). The Korean War was primarily the result of the political division of Korea by an agreement of the victorious Allies at the conclusion of the Pacific War at the end of World War II.

UN Partisan Operations

UN partisan operations in Korea began more by chance than from planning. During the retreat in Nov-Dec 1950, thousands of anti-Communist North Korean citizens were left behind to fend for themselves. Facing almost certain death at the hands of the communist invaders, these people fought their way to North Korea's west coast and sailed to offshore islands where they prepared to fight a last ditch battle. The US 8th army eventually learned that friendly North Koreans still held the offshore islands. In January, the Guerilla Section, Eighth Army G-3 Miscellaneous, came into being.