"1919Z"^^ . "1917Z"^^ . . . "99th Aero Squadron"@en . . . "125px" . "The 99th Aero Squadron was a Air Service, United States Army unit that fought on the Western Front during World War I.The squadron was assigned as a Corps Observation Squadron, performing short-range, tactical reconnaissance over the V Corps, United States First Army sector of the Western Front in France, providing battlefield intelligence."@en . "Corps Observation" . . . . .