Quote Originally Posted by Mr White
In my last english campaign, I could build turcopoles in palestine or somewhere in that area. It wasn't on my tech tree (the one on this site) so I was pleasantly surprised that I could build horse archers. This was a lucky break as the required buildings where there allready and I wasn't planning on building them.

Are there other 'hidden' units in the game?
No, though the tech tree that comes with the game is rather bad. Turcopoles can be built by all Catholic factions in Edessa, Antioch (valour bonus), Tripolis and Syria.