People often assume that the Roman empire was built on the strength of it's armies alone. In truth it was the Roman beliefs and values, greater unity than their neighbours, better system of government, higher morale and better training of troops, logistics and way of life that all contributed to establish the Roman Empire, not brute force alone. The idea that the Romans simply headed north and wiped the floor with the inferior "barbarians", because they had tougher armies, is a little naive.

The Romans' Manipular formations and tactics were also superior to many of their opponents at the time, again this is something for the player to learn to do in battle. Forming up your units with use of good tactics (which is how the Romans won their battles), as opposed to bum rushing the RTW Roman uber units at the barbarians knowing quite well that you're going to win nearly every time, because of the overpowered nature of the Roman units.