After reading this thread over at TWC, i have realized that it might work really well in RTW.
In short, according to that thread, a large enough cavalry force will slow down that army because of the ammounts of supplies that horses need to consume.
In my opinion, if the marching distances of a certain army were implemented based on the army's size, and its infantry to cavalry ratio, it could force the player to use the more or less realistic troop loadouts. Basically, it should be something similar to this:
1. Small armies march alot further per turn because they need less supplies and are more mobile in general.
2. An army with a large cavalry force should move slower, and (if possible, of course) each stack of cavalry will reduce the marching distance by some ammount.
3. Non native armies should suffer marching penalties when they are in the desert or snow. Once again, the more horses there are, the slower they would move.

If this is possible, it may make the game more realistically balanced in terms of cavalry use.


What are your thoughts on this?