The 8th Aero Squadron was an Air Service, United States Army unit that fought on the Western Front during World War I. The squadron was assigned as a Corps Observation Squadron, performing short-range, tactical reconnaissance over the IV Corps, United States First Army sector of the Western Front in France, providing battlefield intelligence. IV Corps was transferred to the United States Second Army in October 1918 for a planned offensive drive on Metz which was cancelled due to the 1918 Armistice with Germany on 11 November.