WW1 Europe: German Aerodrome in "Ad Astra" (Location)

This location represents the place where the German aviator who appears in "Ad Astra" as Monaghan's prisoner must have been stationed when, on the last day of World War I, he receives the news about his brother Franz's death. As he describes his subsequent actions, he says nothing about where he is at the time, but since he takes off in a plane, it must be an air base of some sort.