Twentieth Air Force Bombardment Group, remaining at North Field, Guam as its only operational organization. In 1949, budget reductions forced the realignment and consolidation of Air Force units in the pacific, and the mission of Twentieth Air Force became the defense of the Ryukyu Islands and was reassigned to Kadena AB, Okinawa. It commanded the following units: On 27 June 1950, the United Nations Security Council voted to assist the South Koreans in resisting the invasion of their nation by North Korea. President Harry S. Truman authorized General Douglas MacArthur (commander of the US occupying forces in Japan) to commit units to the
North Korea–South Korea relations the South the following year, though the US Korean Military Advisory Group remained to train the Republic of Korea Army. As a result, two antagonistic states emerged, with diametrically opposed political, economic, and social systems. Both opposing governments considered themselves to be the government of the whole of Korea, and both saw the division as temporary. The DPRK proclaimed Seoul to be its official capital, a position not changed until 1972. North Korea invaded the South on June 25, 1950, and swiftly overran most of the country. In September 1950 the United Nations force, led by the United States, intervened