Empires

Empires are comprised of multiple users. That is to say, the user model has_one empire, while the empire model has_many users. I'm not sure at this point which relationship takes precedence, but I imagine that has_many would.

If, upon login, a user does not belong to an empire, the user will get the opportunity to enroll in one of the predefined empires. Each empire may potentially have a special advantage that will make it different from other empires (i.e. bonuses of some sort).