USS Iowa (BB-61) 1948, as part of the post World War II drawdown of the armed forces, "Iowa" was deactivated at San Francisco, and then formally decommissioned into the United States Navy reserve fleets on 24 March 1949. In 1950, North Korea invaded South Korea, prompting the United Nations to authorize military intervention. President Harry S. Truman ordered US forces stationed in Japan to transfer to South Korea. Truman also sent US based troops, tanks, fighter and bomber aircraft, and a strong naval force to the area to support South Korea. As part of the naval mobilization, "Iowa" was reactivated on 14 July
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