Heroes 5.5 WarGame Edition - Tactical Edition.

If a Knight were just a mounted warrior, they would be on par with an elite swordsman, if not lower. Knights are elite heavy cavalry. The difference between a Knight and a regular mounted unit is the same as the difference between an elite swordsman and a simple recruit. Moreover, a Knight's steed is from an elite war breed and weighs around a ton, while an ordinary racing horse weighs half as much. The base damage is low because the base damage is inflicted upon impact. However, when charging, they gain +100% damage for each cell traveled, meaning that if they charge across all 6 cells, they receive 7x the damage. A Knight's charge is not something to be mocked by elven riders; it is one of the most powerful abilities in the game. The main combat power is achieved through the charge, and it's not just an extra bonus to damage.