Quote Originally Posted by Malimar View Post
Pretty sure yes, there's nothing different about crusades from regular wars in this regard.

(Technically, having the ruler of the opposing forces in your prison doesn't automatically end the war -- but it does give you an automatic 100% war score.)
I once joined a crusade with the crusade target captured. Since nobody except the pope had actually fought any battles yet, the pope forced a win and got all of Andalusia as a new papal state. I don't know if this has changed, but it used to be that republics and theocracies could not usurp king level titles, so he didn't have the title of Andalusia.