I responded to a Crusade for Jerusalem to get the Crusader points and arrived in the Holy Land expecting to see a crowd, but it was only the Papacy's 4k and my own 5k troops. I promptly beseiged the county next to the Papacy and waited for the Arabs to come screaming out of the dunes. It took awhile, but soon a 7k strong Caliphate army appeared on the screen, headed right for the Pope's army. He was doomed unless I left my position to reinforce, so I marched my boys through the burning sands and met the infidels as they engaged the Pope's army. It was a slaughter.
Having abandoned the first seige, I elected to sit with the Papacy to hurry their siege. As soon as the first Barony fell they moved. I don't like leaving enemy troops behind the lines, so I stayed to finish it off. Another 7k Caliph army strolled into the picture. As tghey moved towards the Papacy, I maneuvered again to reinforce. To my surprise (it was a bit more than that at the time) the Pope left me right before the Caliph hit, leaving me to die in the desert sun.
As it turned out, we finally won the Crusade, with me as biggest contributor. After declaring myself King of Jerusalem to see what benefits there are to that (do it if you can!) I gave away the Holy Land to.... the Knights Templar. It would have been the Pope, but never again.
Besides, I figure the Knights deserve whatever they can get after what happened to them on Friday 13.