Air bases in the United States went on mobility alert to prepare for overseas movement in response to what was then described as the "Korean Emergency." Units from SAC and CONAC were deployed to Japan and South Korea, while Air Force Reserve and Air National Guard units were recalled to active duty and, in the case of the Air National Guard, placed under Federal Service in case they were needed. What started out as an emergency turned into a bona-fide war. The Korean War marked the creation of a professional Air Force that would grow in size and strength for decades to come.