Factual error: The British carry WW-I, No 1 Lee-Enfields, and the Germans carry WW-II era British No. 4 Lee-Enfields.
Factual error: Some of the German planes that appear in the film are actually just British-made Tiger Moths painted in German airforce markings. The Moth was a type that was only built some years after the end of the First World War.
Factual error: The Fokker DR1 aircraft should be rotary engines which have a completely different sound than the radial engine which is shown after landing following the strafing mission against ground troops, when Lt. Stachel disobeys orders and engages in aerial combat with the British planes.
Factual error: 1. When Stachel first arrives at the squadron, they already have Fokker DVII's as part of their complement. This machine did not come into service until after Richthofen was killed, yet he makes a brief appearance in the scene where Stachel is shot down. 2. The German markings are of the older style (prior to the introduction of the DVII). From early 1918 the national insignia is supposed to be simplified, like a plus sign, without the flared look of the Maltese cross.
Factual error: Set in the first world war, 1914-1918, but throughout the film the scenes of German infantry are armed with British Lee-Enfield No 4 rifles which were first issued in 1941 and fitted with the small British knife bayonets first issued in 1943.