Holy War Casus Belli

[Turncloak]

What happens if the enemy concedes defeat under this casus Beli, do they change religion to my religion or what.. I don't really see the value in holy war to be honest, since it doesn't allow me to subjugate in the grand scheme of things.

[Xara]

It's a cost reduction for what you take, it allows you to safely declare war without having any claims, and yes, force religion becomes an option, though any nation larger than 3 provinces or so will be immune. Force religion is a warscore option, it doesn't automaticallly happen and it was changed heavily in patch 1.2

And what do you mean it doesn't allow you to subjugate? You can use cleanse heresy or holy war to force vassalization.

[Turncloak]

But I get massive aggressive expansion penalty as a result, then the foreign religion countries join coalitions with the christian countries and want to destroy me.. It's completely stupid.

[Xara]

That happens anytime you take large chunks of territory. Christian nations will happily join you to crusade against the Turks, that doesn't mean they want you expanding your holdings because of it.

Conquest is like a buffet line. Take a sample of a lot of different dishes, don't pile 8 helpings of roasted chicken on your plate.

aka : expand in multiple directions and different areas rather than annexing 6 provinces from one nation, or you WILL earn huge AE. Religious idea set finisher and a diplomat advisor as well as some other various things can burn off the AE you do earn and keep coalitions down.

An exception is if you are fighting distantly and can simply murder any coalition that does form. As the Ottomans for example I fought the Mamluks every 5 years and took their two dozen or so provinces nonstop. I had over 400+ aggression from them and they'd been in a coalition since the start, but due to the regional setup, other nearby nations like Qara and Aq would get like 1/5th of the AE. They'd join the coalition but drop out before truce expired, because all the 'regional' conquest I had was in Egypt and the Red Sea, and I could fight Hedjaz and Najd and Adal and Oman all together and simply wipe them all out at the same time.