We just watched Centurion last night, I thought it was good. It is violent (gore and a bit vulgar so not for kids), but it follows a plausible scenario of the 9th Legion Roman army when they tried to invade Britain in early AD. As it is right now (being a history buff) the movie follows an old belief that this elite army (mostly made up of veteran soldiers by this time) was wiped out by a small rebel army from the Picenum region, dubbed the Picts. Newer history tells us that some of the 9th Leigon may have survived because their names come up at later battles, but there is limited facts on the newer idea so the story the movie follows could be true, plausible at least.