The photo that "Deacon" carries throughout the film is of actor Corbin Allred's grandmother, and is in fact the photo that Allred's grandfather carried with him throughout WWII.
All guns used in the film are authentic and fully-functional, modified to shoot blanks.
The character of Gordon Gunderson, played by Peter Holden, is named after Holden's grandfather, a veteran who fought in the actual Battle of the Bulge.
Over 100 war re-enactors volunteered to participate in filming, lying in the snow for hours at a time.
The late Charles Durning was one of the survivors of the Malmedy Massacre depicted early in the film.