Its not a clear cut thing this high ground stuff, I have read more than once that formed cavalry actually prefer not to go downhill, as it leads to disorder, and I can certainly believe that infantry too would break up their formation if they speeded up too much.
Cheers john s
Goiong downhill put the horse on the forehand and increases the risks of tripping, and not all horses will be as forward going as each other when it comes to going down a hill causing a break up of formation.
Going up hill has the horse working well and truly from behind, and the hind quarters are the powerhouse of the animal. It is easier to keep formation, and most horses get very eager at the possability of letting rip up a hill - although a competant officer will only sound the final evolution of the charge at the last minute to make sure the charge makes contact with the greatest shock of impact.
Emsdorf and Victory,