World War I

During World War I, Secretary of War Newton Baker advocated an expanded role for aviation. Business and political leaders on both sides of the Mississippi River wanted the Midwest to be chosen as a site for one of the new "flying fields." Aerial expert Albert Bond Lambert joined the St. Louis Chamber of Commerce and directors of the Greater Belleville Board of Trade to negotiate a lease agreement for nearly 624 acres of land.

After inspecting several sites, the U.S. War Department agreed to the lease June 14, 1917. Congress appropriated $10 million for its construction, and 2,000 laborers and carpenters were immediately put to work. The layout of Scott Field was typical of aviation fields built during World War I. Construction began in June 1917. The government gave the Unit Construction Company 60 days to erect approximately 60 buildings, lay a mile-long railroad spur, and to level off an airfield with a 1,600 foot landing circle. Construction was underway when the government announced, on July 20, 1917, that it would name the new field after Corporal Frank S. Scott, the first enlisted service member killed in an aviation crash. Scott had died after an unexpected engine failure had brought down the aircraft that Lieutenant Lewis Rockwell had been giving him an orientation flight in at College Park, Maryland, on September 28, 1912.

Scott Field began as an aviation-training field for World War I pilots in August 1917 when the 11th and 21st Aero Squadrons from Kelly Field, Texas, arrived. Construction was completed in August, and the first flight from Scott Field occurred 2 September 1917. Flying instruction began 11 September 1917. Later the 85th and 86th Aero Squadrons arrived, and more than 300 pilots and many ground units were trained for service by the war's end in 1918.

Training units assigned to Scott Field were:

Post Headquarters, Scott Field – October 1919

114th Aero Squadron, February 1918

Re-designated as Squadron "A", July–November 1918

221st Aero Squadron, December 1917

Re-designated as Squadron "B", July–November 1918

242d Aero Squadron (II), April 1918

Re-designated as Squadron "C", July–November 1918

Squadron "D", July–November 1918

Flying School Detachment (Consolidation of Squadrons A–D), November 1918 – November 1919

By 2 September, William Couch, a civilian flying instructor, and Scott Field Commander, Major George E. A. Reinburg, made the first flight from Scott Field in a Standard J-1 two-seater biplane. At least seven J-1s were already on Scott; by the time the first Curtiss JN-4D "Jenny" arrived. Operable from the front or rear seat, the 8-cylinder, 90- horsepower, Jenny would become the primary trainer used on Scott Field. Everything moved fast in a wartime environment, including the dangerous act of learning to fly airplanes. A judgment error or weather shift could produce severe accidents in the fragile aircraft of the day, so it soon became apparent that Scott Field needed a medical air evacuation capability.

Determined to improve the recovery of Scott's downed pilots, Captains Charles Bayless (post surgeon), Early Hoag (officer-in-charge of flying) and A.J. Etheridge (post engineer), along with Second Lieutenant Seth Thomas, designed two air ambulances, or hospital planes—using a configuration likely modeled after one in use at Gerstner Field, Louisiana. By the summer of 1918, Scott Field's engineering department had completed the rear cockpit modifications needed to convert two Jennies. Not long thereafter, on 24 August 1918, as aviator with a broken leg became Scott's first air evacuated patient.

Also reassuring was the support Scott Field enjoyed from the local community. Plenty of curious sightseers came just to watch the construction or catch a glimpse of airplane activity, but many from the local community also gave morale support to their "Sammies" (Uncle Sam's boys). They hosted dances and receptions, established a library branch on the field, and invited soldiers into their homes for Thanksgiving dinners. Likewise, Scott Field hosted sporting events with their community neighbors. On 17 August 1918, they invited the public to attend a field meet and flight exhibition—Scott's first air show.

Flying was discontinued at Scott Field after the war and the base population dropped. The War Department purchased Scott Field in 1919 for $119, 285.84

Inter-War period

Scott Field's future became uncertain after the 11 November 1918 armistice with Germany and the end of World War I. Large scale demobilization closed many U.S. airfields. Scott's remaining units were organized into a Flying School Detachment, and the field itself was designated as a storage site for demobilized equipment. Welcome news came early in 1919, with the War Department's announcement of its decision to purchase Scott Field, a decision influenced by Scott's central location and exceptional purchase price of $119,285.84. This gave Scott a promise of a future; however, it still lacked a mission.

Scott was transformed into a lighter-than-air (LTA) station in 1921, with the transfer of the Army Balloon and Airship School from Brooks Field, Texas.