The most likable feature of this film is

Rating: 2/10 (9 July 2005)

that it's not left to the U.S. armed forces to save the world, for a change. Besides that, there is not much going for the plot.
All actors did their best to portray their characters believable but a script, which can only be described as utterly poor and full of flaws made all their effort void. Besides plenty of technical faults defying the laws of physics and logic, on a number of occasions the characters are made jump to the stupidest of ideas and actions without any reason given, leaving the viewers puzzled.
Other than title and trailer suggests, this is neither a war nor science fiction film but is better described as a road movie. Of course there are much better ones out there.
Like in most road movies the film ends as our "Hero" reaches his destination, and in this movie quiet abrupt. Rather suddenly all enemies are defeated and all is over in a flash.
The ending is definitively the worst part of the movie and will leave you unsatisfied.