Centurion (2010)
A pretty damn entertaining film directed by Neil Marshall (Dog Soldiers, Doomsday) and starring Michael Fassbender, Dominic West, and Olga Kurylenko about the Roman 9th Legion who get ambushed while trying to root out the "Picts" who were Celtic warriors.
The 9th gets massacred leaving only a few surviors, and its becomes a quest for those remaining soldiers to make it home alive, while being hunted by the "Picts" over the vastness of Scotland. I thought this was a very effective chase film with some really beautiful cinematography and landscape shots. The fight scenes are well choreographed and brutal as well.