Pacific Air Forces to French Indochina as well as aid to the Nationalist Chinese during the Chinese Civil War which resumed after the end of World War II (1945–1949). On 25 June 1950, the armed forces of the Democratic People's Republic of Korea (e.g., North Korea) invaded South Korea. On 27 June, the United Nations Security Council voted to assist the South Koreans in resisting the invasion. President Harry Truman authorized General of the Army Douglas MacArthur (commander of the US occupying forces in Japan) to commit units to the battle. MacArthur ordered General George E. Stratemeyer, CIC of FEAF, to attack attacking
United Nations Command members providing military forces and other assistance to South Korea "make such forces and other assistance available to a unified command under the United States of America". President Syngman Rhee of the Republic of Korea assigned operational command of ROK ground, sea, and air forces to General MacArthur as Commander-in-Chief UN Command (CINCUNC) in a letter (the "Pusan Letter") of July 15, 1950: On August 29, 1950, the British Commonwealth's 27th Infantry Brigade arrived at Busan to join UNC ground forces, which until then included only ROK and U.S. forces. The 27th Brigade moved into the Naktong River line west