Corps, a privately funded program to train civilians to pass the Reserve Military Aviator flying test and receive commissions in the Signal Officers Reserve Corps. The instructional program was under the guidance of the Army's Eastern Department, commanded by Major Gen. Leonard Wood, and trained seven civilians who were commissioned as Reserve Military Aviators. World War I After the United States' entry into World War I, the unit, less New York guardsmen and the new Reserve military Aviators were organized into a new unit at Mineola by Major Raynal Bolling and now-Captain Carroll. Federalized in June 1917, the 1st Reserve Aero Squadron trained during the summer of 1917 and sailed for Europe aboard the RMS Baltic on 23 August with eight other aero squadrons. Reaching France in Le Havre, on 17 September, it arrived at its duty station at Issoudun Aerodrome, home of the Third Aviation Instruction Center, on 21 September. After receiving further training in French schools in Pau and Tours Aerodrome until November, it assembled, serviced, and repaired aircraft. The 1st was redesignated as the 26th Aero Squadron on 1 October 1917 as part of a reorganization of the Air Service of the AEF. The 26th Aero Squadron left Issoudun on 13 April 1919, and remained in France until May 1919 when the unit returned to the United States and was demobilized. Interwar period The 26 Squadron (Attack) was authorized on 30 August 1921 and the following month was organized and assigned to the 3d Attack Group at Kelly Field, Texas. It was assigned various World War I era biplanes and experimental American aircraft of the 1920s, the squadron patrolled the Mexican Border, delivered airmail and performed other missions as assigned until inactivating in 1924, shortly after consolidating with the World War I 26th Aero Squadron. The squadron was reactivated as the 26th Attack Squadron in Hawaii in 1930. It was equipped with Curtiss A-3 Falcons, which were used as fighter-bombers in the 1930s as part of the defense of the islands. Newer Douglas B-18 Bolos were assigned in late 1939, and the unit was redesignated as the 26th Bombardment Squadron. The B-18s were relegated to second-line patrol duty over the approaches to Oahu in 1941 when Boeing B-17E Flying Fortresses arrived in Hawaii. World War II During the Pearl Harbor Attack, many of the squadron's aircraft were damaged at Hickam Field, and the survivors were reformed at