I thought during those medieval ages horses were a major feature. Perhaps we can expand on the existing rules. I can imagine we can add some features such as breed of horse, how riding horses would react in combat and getting wounded, what a horse would do during a fight with an ogre or vs elephants or whatever. As it stands the horses seem quite featureless.

There were many types of horses, some of them were good for dragging luggage around but not for riding. I think the fast ones came from the middle east? Based on what I've read online....

I mean, cavalry made a big contribution in battles. Perhaps Knights can be expanded, we can create a few additional skills related to horsemanship for the knights and barbarians? I suppose you're not going to ride into Vallander's tomb on a warhorse but I think galloping on the wrong terrain can be dangerous for horses right? Potholes and all?