The 107th Fighter Squadron (107 FS) is a unit of the Michigan Air National Guard 127th Wing. It is assigned to Selfridge Air National Guard Base, Michigan and is equipped with the Fairchild Republic A-10 Thunderbolt II aircraft. The squadron is a descendant organization of the World War I 107th Aero Squadron, established on 27 August 1917. It was reformed on 7 May 1926, as the 107th Observation Squadron, and is one of the 29 original National Guard Observation Squadrons of the United States Army National Guard formed before World War II.