The version I saw of this film, was called "The Killing Box" and this film had a whole damn lot of potential, but sadly isn't as great as it could've been. A civil-war movie mixed with a supernatural theme and a most peculiar cast (Adrian Pasdar, Corbin Bernsen, Ray Wise, Billy Bob Thornton, Martin Sheen, David Arquette, Matt LeBlanc,...). It really is a challenge spotting all of them. It's also hard to pinpoint where exactly the movie comes short. The flaws are there, I just can't really pinpoint them. Apparently a lot of the movie ended on the cutting room floor in post-production, so that could explain quite a bit. But there seems to be a director's cut with a much longer running time out there, under the name "Ghost Brigade". In this version the main characters have a lot more depth and should be more interesting. Even the unstoppable ghost brigade should have much more screen time and background-story in this longer version. So someone release this director's cut version on DVD, and I just might pick it up.
Review of Grey Knight
