Includes a photo of a figurine of a "Parthian archer". Note the proportions of the horse vs human: this is a small pony by modern standards. this person is far

Includes a photo of a figurine of a "Parthian archer". Note the proportions of the horse vs human: this is a small pony by modern standards. this person is far to large for that mount. Give the ancients credit for animal husbandry, and these horses would have been robust little critters. still that size mount will not carry a human in vigorous action for very long at all. Replacement mounts and all the extra logistics that entails? Or were the horse archers an expensive one shot item to use in battle?