; Whereas, the School of Fire for Field Artillery was founded at Fort Sill in 1911 and continues to operate as the United States Army Field Artillery School; Whereas, throughout its history, Fort Sill has served as home to— (1) the Infantry School of Musketry, which was later renamed the Infantry School and moved to Camp Benning, Georgia; (2) the Gas Defense School; (3) the School for Aerial Observers; (4) the Artillery Officers Candidate School (Robinson Barracks); (5) the Air Service Flying School; (6) the Army Aviation School; (7) the School of Fire (now known as the Field Artillery School); and (8) the Air Defense Artillery School; Whereas, in 1915, the first air unit in the history of the United States Armed Forces, the 1st Aero Squadron, was stationed at Fort Sill for experiments in the aerial observation of artillery fire and, in 1916, was sent into combat with General Jack Pershing on an expedition into Mexico; Whereas, in 1917, the Henry Post Army Airfield was constructed for aerial artillery observation and spotting; Whereas, with the start of World War I in 1918, the post expanded quickly, and the Army established Camp Doniphan on the northwest edge of Fort Sill in order to assemble, house, and train entire divisions before sending the divisions to Europe; Whereas, during World War I, Fort Sill found itself with a unique new training mission, as the War Department was unprepared to train officers and soldiers for the threat of weapons of mass destruction posed by the wide-scale use of chemical weapons in Europe, and soldiers had to be equipped and trained for the new threat; Whereas the 35th Division was constituted in 1917 as 1 of the 17 National Guard divisions authorized for service in World War I; Whereas the 35th Division— (1) was organized from the National Guards of Kansas and Missouri; (2) included 3 machine gun battalions, 3 field artillery regiments, 4 infantry regiments, 1 engineer regiment, and 1 signal battalion, with a total strength of 26,373 soldiers