heavy cavalry engaging heavy cavalry

[Sean Manning]

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There has been much talk of how "enemy-shy" horses were back in ancient times; and how a full charge against a solid infantry or cavalry wall was a physical impossibility. I take a different stance-- YES, cataphracts did charge against a formation because their horses were trained specifically for such warfare. Anyone who has played polo knows this. A polo pony is trained to pass by its opponent by mere inches. The horse does not balk, stop, or even flinch. I am so tired of hearing how the ancients were so crude, so stupid, that they could not breed or train their horses to accomplish what modern horses now do...............

Because it's much closer in history and there are so many more reliable sources available (and I certainly don't think there's any real difference between now and then) - do you not credit that horsemen of the 15th to 19th centuries also were of the opinion that a cavalry charge against formed troops with bayonet-fitted muskets or even pikes was doomed to failure unless the line/square broke or a dying horse crashed in and broke them?

I have never found anyone who believed that before the 19th century, let alone descriptions of actual fights to support it . Could you give me some examples of people who you think did believe that before the French Revolution?