How do I Crusade?

[Quintus.JC]

maybe they escape using the boats on the ship. kind of weird though
well, Jihad's were for Islamic factions that defend they're land were more succsessful then the Crusades. Crusading armies need to sail or march from a long distance

Historically so, but in the game a Jihad could carry you all the way to Paris or London. So it's not necessarily just the long distance marches for the crusaders.