Air Force Historical Research Agency, 22d Intelligence Squadron (2013)
“ Flying training unit, Nov 1917-1918; maintained aircraft and underwent combat training while attached by flights to British day bombardment units serving on front with British Second and Fifth Armies, Mar-c. 24, Jun 1918; combat as pursuit unit with American First Army, 21 Aug-8 Nov 1918. 135th Aero (later 22d Observation) : Combat as corps observation unit with IV Army Corps, 7 Aug-c. ”
