Well at least it was better than the fairy tale Arthur films, although there you're not constantly thinking "That's not true". The tortures of being a history buff!
But why does Hollywood have to get everything wrong? From the date, to Pelagius' death, to the fact that there still Sarmatian auxiliaries when the Roman Empire was so weak it couln't even defend its borders let alone venture into barbarian territory to take a few boys to fight for them. Pathetic.