A Midnight Clear Reviews
Otherwise a useful movie info entry which would greatly benefit from losing the spoiler.
After wandering around in subzero temperatures for as long as couple of days carrying their comrade's corpse, they are able to pump fresh red blood out of the body to paint Red Crosses on themselves. What blood was left in the body would have been frozen brown lumps.
Even though they are lost and the Battle of the Bulge is supposedly raging all around them, disguised as medics carrying a dead body they somehow walk into American lines.
Another cliche ridden war movie.