I think this is a great 'fantasy' film. I say this as some are nit picking about the lack of historical fact. If it followed facts there would be no film at all, thats the whole point of the film, a good yarn!
And a damn good one at that. Gladiator is another example, not much fact but a great film. As for realism, Romulas, Vortkin, the Goths, the Eastern Empire, Hadrians Wall, all there for some realism. And a great stirring sound track.