Issoudun Aerodrome was a complex of military airfields in the vicinity of Issoudun, Centre, France. They were used during World War I as part of the Third Air Instructional Center, American Expeditionary Forces for training United States airmen prior to being sent into combat on the Western Front. It was at that time the largest air base in the world. Today the entire complex consists of agricultural fields, the military facility totally obscured with no trace of its wartime history.