The 821st Aero Repair Squadron was activated in order to provide service and repair to aircraft flying within the United States during World War I. It was stationed on the grounds of the Indianapolis Motor Speedway, which was closed to racing during the United States' participation in the war.
The Sabre Squadron | Aero L-159 Alca | Aero L-39 Albatros | No. 33 Squadron RAF | No. 263 Squadron RAF | squadron | Pacific Squadron | DNA repair | No. 45 Squadron RAF | No. 127 Squadron RAF | No. 617 Squadron RAF | No. 43 Squadron RAF | No. 38 Squadron RAF | No. 107 Squadron RAF | German East Asia Squadron | Far East Squadron | Automobile repair shop | Aero Spacelines | Squadron (aviation) | Royal Aero Club | No. 77 Squadron RAAF | No. 71 Squadron RAF | No. 49 Squadron RAF | No. 48 Squadron RAF | No. 2 Squadron RAF | No. 233 Squadron RAF | No. 133 Squadron RAF | Asiatic Squadron | Aero Commander | 44th Fighter Squadron |