The 90th Aero Squadron was an Air Service, United States Army unit that fought on the Western Front during World War I.
90th Aero Squadron – Capt. W. G. Schauffler – Standing Lt. Fred Tillman – Seated in a Salmson 2A2, Bethelainville Aerodrome, France, 11 November 1918
Ourches Aerodrome – France, July 1918
90th Aero Squadron – Salmson 2A2 in Flight.
Souilly Aerodrome, France, October 1918