Re 19. Horse Archers Were Unstoppable People do not realize, that Carrhae was a special case. In normal circumstances horse archers would run out of arrows qui

Re 19. Horse Archers Were Unstoppable People do not realize, that Carrhae was a special case. In normal circumstances horse archers would run out of arrows quickly and Roman infantry would simply wait them out in testudo formation. Surena (Parthian general) had prepared well for this particular battle and for every horse archer he had 2-3 transport animals with spare arrows (that must had been a lot of arrows per archer) so his archers could keep pressure for a few days without running out of arrows, wearing Romans out. He could do that because Parthians had been operating close to home [so Surrena didn't have to worry about fodder for horse and transport animals] (and he had enough time to manufacture all those arrows ahead). Also generally Roman infantry had been generally more rapid force in the field then any larger mounted force. Mounted Roman army required fodder transported by oxen carts - which made horsemen much slower over larger distance then marching infantry... So logistics matter... > Crassus now hoped that his legionaries could hold out until the Parthians ran out of arrows.[28] However, Surena used thousands of camels to resupply his horse archers. Upon this realisation, Crassus dispatched his son Publius with 1,300 Gallic cavalry, 500 archers and eight cohorts of legionaries to drive off the horse archers. The horse archers feigned retreat and drew off Publius' force, which suffered heavy casualties from arrow fire. https://en.wikipedia.org/wiki/Battle_of_Carrhae https://en.wikipedia.org/wiki/Battle_of_Carrhae