Victory by Preaching?

[Norfleet]

That's right: Even if he DOES have provinces, you can still attempt to simply preach him out. This can even happen without your knowledge, if you have very powerful dominion, and your opponent is weak: My dominion wiped out Ulm once before I even so much as attempted to attack him, simply because Ulm is so bad at the entire preaching thing. All of his provinces went white and his units disbanded.

However, preaching out Ermor may prove to be a tough job: Ermor tends to have very strong dominion and will not be preached out with a lot of work....and if you have that many priests preaching for all they're worth, you probably can beat Ermor on the ground anyway.