Originally Posted by
TiberiusBeskar
For some reason, I thought Switzerland were technologically advanced and quite rich in those days too. But that could be the reason. They are that poor, it isn't worth the effort to invade.
An interesting way to mod Switzerland then, is to make it a poor area, but give the faction a big income per turn, so they can have an upkeep of a strong army or make it that garrisons spawn when some one invades, to represent the defenders, sort of like a revolt system, to represent the people picking up their arms to defend. Latter is most likely the best way, but harder to code.