Visible crew/equipment: In the scene where Jeremy Kemp and George Peppard are playing daredevil in their planes and Kemp's plane hits a brick tower there is a shot of the plane plummeting to the ground. The alert viewer can see the shiny metal wires that were used to support and guide the plane on its way to the ground.

Continuity: The film is set on the Western Front, 1917 but was filmed in Ireland in 1965.  As George Peppard is driving to join his squadren for the first time the camera pans the horizon and loads of houses can be seen to have TV aerials...

Continuity: The British carry WW-I, No 1 Lee-Enfields, and the Germans carry WW-II era British No. 4 Lee-Enfields.

Continuity: George Peppard says his squadron shot down seven enemy planes after returning from a dogfight with SIX English aircraft.

Revealing: In the scene where Lt Stachel and an ordinary soldier search for the wreckage of Stachel's unconfirmed first shoot-down, it is supposed to be dark and pouring rain but blue sky is seen in the background.

Continuity: Lt. Stachel arrives at the squadron headquarters and the parking area is dry and dusty. He goes inside and when he emerges only minutes later the parking area is muddy and covered with large puddles.

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.

Continuity: After George Peppard shoots down the English spotter plane at his airfield, fellow pilots crowd round as he confronts his Squadron Leader. The tail of the downed aircraft is behind him. When the shot changes to show George walking away, however, the crowd is standing in a different position in relation to the tailfin.