What Does It Say About Development, the Pace of Change, and How Cultures Influence Militaryes?

Paro: How could an army fighting more than two thousand years before the one fighting at the battle of waterloo have any chance at all? He says there's a pre stirrup and a post stirrup period when it comes to cavalry and stirrup. And i certainly think that if i'm on horseback with a 12 foot, nine to 12 foot lance, i'd rather have that than a man on horseback charging with a sabre. That's a personal preference question, isn't it?