A long invasion marked by an ever-increasing number of both Crusader and Saracen troops trying to get through your wall
(assuming, of course, that you've gotten one built!) ...this campaign stretches from January 1181 to January 1216.
Invasions are ongoing up through the middle of 1212. All enemy units must be annihilated by January 1216, or you will lose.
Clever idea, the combination "Enemy on map" -> Defeat. Works as a timne limit.
On this map with abundant resources it should be no problem to design a stronghold and to train lots of troops. Including a bunch of fast knights.
The deposits of stone and iron could be designed more varied.