Well this won't work probably for the current movement system...
If we get rid of the restriction of moving 1 region per turn and replace it with fatigue to control how much a unit can travel, I think cavalries can be used more efficiently. They can outrun infantry units to reach inner regions of enemies to loot and be more useful than just being a heavy hitter in a battle.
Field camp option can be used to reduce fatigue while travelling. (does anyone even use field camp now that we have delay arrival?) Make the influence of fatigue somewhat exponential.
For example,
A unit of 50 men with 0 fatigue can travel 10 miles per hour where as a unit of 50 with 50 fatigue can only travel 3 miles?
