Corrected entry: Sgt. Guffy is shown with Lucky Strike cigarettes in a green carton. At the beginning of WW2 an ingredient in the green dye was determined to be necessary for war production. The carton was changed to white & red; "Lucky Strike Green Goes to War" as the advertisement said. Since the Battle of the Bulge was in Dec. 1944 it is doubtful cigarettes that were 3 years old would still be around.
Corrected entry: During the battle for Bastogne a German tank is coming over a wall. Two GIs place plastic explosives the size of bricks (and white), on the underside of the tank. Watch as the explosives are placed - they disappear, then they return again just before the explosion.
Corrected entry: In the movie, all of the German soldiers are wearing Jackboots, tunics with scalloped pockets, and/or greatcoats. Yet due to material shortages, Tunic pockets were cut straight, and low boots with leggings were issued. As for winter gear, many soldiers were issued winter camouflage.
Corrected entry: Lt. Col. Daniel Kiley is in the scout plane taking pictures of suspected German activity. He is using what I believe to be a "Speed Graphic" - a camera commonly used by the press for many years. The problem is the camera has no telephoto capability and could not have produced the photo of the German Colonel which was later shown.