Can’t speak much about the American revolution but I do know that even in World War One the initial conflict between Britain and Germany was lost by Britain because the unit attempted a cavalry charge at German positions and they got gunned down. That war was not expected to play out like it did. No wonder the best tactic the generals could come up with was to send wave after wave of men over the top of the bunkers, they had no other experience of battle tactics than to charge in.