Factual error: It is 1943, but the bathroom in which the pilot is throwing up is completely fitted with PVC drains and copper quick couplings. Neither existed at the time.
Factual error: Max tells Marianne he plans to buy a ranch at the end of the war in Medicine Hat, Saskatchewan. Medicine Hat is in Alberta.
Factual error: Brad Pitt refers to 'Triple A'. This is an anachronism - the terms of the period were Ack-Ack or Flak.