After completing their training, Milling and Arnold reported to College Park, Maryland, detailed to the Aeronautical Division, U.S. Signal Corps to instruct the commander of the division flight school, Captain Charles DeForest Chandler, who had only balloon experience, and his adjutant, 1st Lt. Roy C. Kirtland, in operating the Wright airplane. The school officially opened on July 3, 1911, and taught ten students, including two members of the National Guard.
