Holley hears Denise and Jarvess talking on the other side of the living room door and rushes into the corridor with a full cup of coffee. He takes one small sip and puts the now empty cup in his pocket.
At one point, when the troops are all riding in the back of the moving truck, the truck is rocking from side to side along the rough road jostling the passengers. As the conversation centers on Hansan and he delivers a few lines, neither he nor anyone else is being jostled by the motion of the truck.
There was already heavy snowfalls and snow on the ground in the Ardennes forest when the Germans launched the 'Bulge' counteroffensive. However, when the characters are shown first digging in in the area outside Bastogne, there is no snow on the ground. The first snow seen is the fall Roderigues (Ricardo Montalban) gets excited about.
When Holley is leading his 3 man patrol, they encounter a jeep with three GI's. After they stop the jeep, Holley says, "What's the pass word?" and the Major in the jeep replies "Texas." That seems acceptable to Holly and then the Major says, "I did not hear the reply" to which Holley replies "Leaguer." Actually, Holley should have stopped the jeep and then said, "Texas" (the challenge) and the Major should have replied "Leaguer." (the response or counter)
The 327th Glider Infantry Regiment used the Club symbol; only the 506th Parachute Infantry, made famous by Frères d'armes (2001) used the Spade, but viewers mistakenly assume that the entire 101st Airborne Division used the spade. The four regiments of the 101st Airborne Division used the four different playing card suits as helmet insignia, and the main characters of the movie repeatedly mention being Glider Infantry.
At the beginning of the movie Holley (Van Johnson) enters the tent wearing a class A uniform. Although currently worn above the ribbon rack, at the time the film takes place, the Combat Infantryman Badge was worn on the left breast pocket, below the ribbons.
Near the end of the film, when the C-47s are paradropping supplies to the soldiers, one of the stock footage pieces is of paratroopers jumping from planes, not supplies being dropped.
Towards the end of the movie, one of the troopers takes out a grenade and places it next to his foxhole with the bottom facing towards the camera. Even though the editors made a smear mark on
the film in an obvious attempt to hide it, you can plainly see that the genuine war surplus grenade had a large hole drilled its bottom.
During the prayer scenes with the padre, one of the soldiers sports a third army patch SSI. The third army under Patton was actually further south, and moving up north towards Bastogne to relief the siege, with its 4th armored division leading the way. Highly unlikely that a member of the 3rd army staff would be there within the Bastogne perimeter.