In the time of the crusades, the templars were in the holy lands to protect pelgrims from bandits and thieves. The Templars all collected their goods as a treasure. Their treasure became bigger and bigger, since the Templars were very famous in the Medieval times.
Now, a war has broken out between some of the mightiest Templars. Their greed for the Templar Treasure is to big. Who wins this treasure? Or will you remain peace between the Templars?
You should try some spots around for the AI's to settle their castles. However, I could say that this is a good multiplayer game.
I know that it isn't quite realistic, but though, I liked it myself.