Kirholm what a strange name. Es tik Salaspili pazīstu.
Also why use Dvina and not Daugava? For the Kirholm I understand but why use the russian name for the river?
You know the rapier is the most rigid sword right?
The reason westerners didnt use cavalry is becuase they focused on sieges while the east had few forts and wast distances to trawel. All military tactics and equipment must be judged in context.