There are some decisions that requires “Full control” of an area, like reforming the Roman Empire or becoming the Saoshyant (Zoroastrian messiah).
However, if you have any holy orders in your lands, those Castles/Temples cause you to officially not have full control. The only way to be able to fulfill the requirement is to expel the holy order, which gives a permanent malus, and prevents future use of the HO (and destroys it if, like the Persian empire, there are no other places they could settle).
This is especially annoying for the Saoshyant decision, since you have to form the Persian Empire first, and the reward for doing that is the very powerful Immortals HO.
So currently, to become the prophesied messiah of the Persian people, you have to destroy its most holy order of warriors and defenders of the realm first.
I sincerely hope that wasn't intentional.
However, if you have any holy orders in your lands, those Castles/Temples cause you to officially not have full control. The only way to be able to fulfill the requirement is to expel the holy order, which gives a permanent malus, and prevents future use of the HO (and destroys it if, like the Persian empire, there are no other places they could settle).
This is especially annoying for the Saoshyant decision, since you have to form the Persian Empire first, and the reward for doing that is the very powerful Immortals HO.
So currently, to become the prophesied messiah of the Persian people, you have to destroy its most holy order of warriors and defenders of the realm first.
I sincerely hope that wasn't intentional.
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