The Roman cavalry are shown using stirrups. This is anachronistic in that the horse-mounted forces of the Roman army used a two-horned saddle, without stirrups. Stirrups were only employed in filming for safety reasons because of the additional training and skill required to ride with a Roman saddle. Catapults and ballistae would not have been used in a forest. They were reserved primarily for sieges and were rarely used in open battles. Fire arrows and canisters fired from catapults were not used at any point in ancient history.