Factual error: The long shots show the supporting tank reversing, but the close up shot of the tank's drive sprocket shows the drive sprocket moving forward, thus the tank should be moving forward, not reversing.
Mountain Man - S3-E1
Factual error: Combat is set in Northern France, where there are no snow-capped mountains. Yet Saunders' troops are crossing such terrain here. It's also apparent that, despite dialogue referring to sub-zero temperatures, it isn't really very cold. The actors are sweating in their snow gear, there's no frost on them, and no one's breath is forming any clouds in the air.
Factual error: The planes Hanley identifies as Messerschmitts aren't. They're stock footage of U.S. P51 Mustangs.