When Lieberman is running from Wolf's men, he passes the man wearing the pink balloon hat three times.
At about 45-minutes: the scene in the barracks before the last mission, the American flag is hung on the wall improperly with the blue field of stars to the upper right. The flag is always to be displayed to the viewer, or audience, with the blue field to the upper left. No military unit would get this wrong.
Clancy Brown is too old for the character's rank of Major.