McTiernan's best along with DH:WaV. It's a play of narrative like Rashomon's (affectionately referenced by the supernatural never-ending rain), openly exploring and questioning the truth of what we see. Yet, it's superior to Kurosawa's by not ending on redemption, but rather exposing the existence of larger narrative controllers that always remain hidden. Also, Travolta was Tom Hardy before Tom Hardy was Tom Hardy ;)
Not a great movie, but a very interesting one. I myself love the "story-happening-in-a-single-night-with-flashbacks" structure and the constant rain adds an almost noirish Usual Suspects vibe to the jungle and military world. And as always, McT does a swell job in the director's chair.
McTiernan's masterpiece? I think so, although I haven't seen Nomads or Rollerball. On top of subverting his usual themes and being an excellent love letter to Rashomon (I particularly love the perpetual downpour), it's probably the most cinematic whodunit I've ever seen.