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
William F. Dean ordered Walker to deploy the division to South Korea as quickly as possible to resist the advancing forces of North Korea. Dean was ordered to send an advance battalion from his division by air to South Korea with a mission to advance and resist leading elements of the North Korean People's Army in an effort to delay them as much as possible while the remainder of the division followed by sea. Dean was given command of all US forces in Korea, and his division numbered 15,965 men and 4,773 vehicles at the time. On July 1, Dean organized the 406-man