Factual error: Nicolas Cage tasers the dude while shaking his hand with surgical gloves. In reality, I'm sure he would have KO'd himself as well from the shock. (00:06:22)
Factual error: In the film, the train is hauled by diesel locomotives on a single track not electrified line. Since early 2000 the Trans-Siberian is double-track and fully electrified.
Factual error: When Ami and Miki are driving nails into the henchman's face to make him talk, it is very clear that the depth of the nails would have killed him, as they would have penetrated deep into his brain. Obviously done for stylistic effect, but a mistake nonetheless.
Factual error: In the streetcar scene a passenger is a soldier wearing a US Army green uniform with a CIB, Comat Infantry Badge. At the time US uniforms were brown and there is no plausible reason for this US soldier to be in that country.
Factual error: During the opening credits. An LCD screen is shown with lat/long coordinates. The movie takes place in the Persian Gulf. The coordinates are in the vicinity of Oceanside, CA.