Cavalry tactics
For much of history, humans have used some form of cavalry for war and, as a result, cavalry tactics have evolved over time. Tactically, the main advantages of cavalry over infantry troops were greater mobility, a larger impact, and a higher position.
Predecessors
Chariot tactics had been the basis for using the horse in war. The chariot's advantage of speed was outdone by the agility of riding on horseback. The ability of horsemen to pass more difficult terrain was also crucial to this change. Horsemen supplanted most light chariots. In Celtic warfare, light chariots (essedum) prevailed among mounted troops, for their ability to transport heavily armoured warriors and as mobile command platforms.
Riding and fighting on horseback
At first it was not considered effective to use weapons on horseback, but rather to use the horse as transport. "Mounted infantry" would ride to battle, and then dismount to fight. For a long time, riders and charioteers worked alongside each other in the cavalry.