- Most of the aerial footage comes from Warner Bros.' previous 1930 version (Dawn Patrol, The (1930)).
- The filmmakers needed several shots of the planes taking off and landing. They assembled a squadron of 17 vintage WW1 aircraft, most of them Nieuports. Flying them proved just as hazardous as in WW1. By the time filming ended, stunt flyers had crashed 15 of them.
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