Quote Originally Posted by I of the Storm View Post
Spoiler Alert, click show to read: 
To make a crusade you must build a chapter house, which you can build after you've built a church, available at keep level
. Then you can 'recruit' a crusade marker which will appear on the campaign map in the province you built it in. Now zoom out and have some spare troops at hand. Take up the marker and drop it in the target province (highlighted red I think). Some dialogue will appear asking you to pay money to the pope. Then the marker will have become an army with a cross sign. You can now stuff troops into it (no limit) and move it towards the target province. It can normally pass other christian territory peacefully and gather troops on the way (while losing some other troops to desertion). Simply keep on going.
i didnt find that chapter house at keep lvl, gonna upgrade to the next castle and hope its there, hope i dont have to upgrade anything else other then that too, if not new game lol....