Well just today, ok ok i tell ya its been haunting me for some time now, an idea crossed my mind.
What about the Money!
An example:
On Selene we got that big ol' empire called Demalion. What currency will it use and will the currency be controlled by the KING ( pardon me dear wise Vizar .. ofc i mean EMPEROR ... ) or some minister?
And now what if i use the renown system to make my OWN money known and if i now convince the locals that my money is good empire money is bad? ... i mean greatfuill subjekts of his dear wise EMPEROR vizar ... that MY iron-wood-coins are more valuable...
Point is: who decides what the legal currency is can a Count for example print his own money, and if thats so, what if the peasents refuse to accept it?
can you pay with Dras money in Neran areas ?
can you BANN ! your neigbours money since you dont want those Criminals ( ofc your neigbours are allways criminals ) to buy YOUR ressources off the shelves?