you mean other than the fact that you may or may not be working with a group of individuals who style themselves after the Roman legion?
A gladius only makes sense if it's used in the "Roman Way". It isn't a weapon for a classic swordfight like in a hollywood movie, you know, two people slashing and crossing blades for minutes.
It's designed for quick stabbing moves behind a wall of shields, thus making the roman legions the best army mankind has ever seen at this time.