The United States' second mobilization in a decade was touched off by the invasion of South Korea on 25 June 1950. 26 Michigan Army and Air National Guard units were called to active military service during the Korean War. Inducted strength of these units totaled 2,742 officers and men. All three squadrons of the 127th Fighter Wing, Michigan Air National Guard, were federalized in 1951. Two squadrons were stationed at Luke Air Force Base, Arizona. The Battle Creek squadron was assigned to Selfridge Air National Guard Base. The remaining federalized Michigan Army and Air National Guard units served in the United States, but some of their officers and men were transferred to units that eventually saw service in Korea. With the exception of those who elected to remain on active duty, most of Michigan's Guardsmen completed their tours of duty by the late spring or summer of 1952 and returned home.