Damage types

[Frein]

mid-evil chain mail was not pierce resistant. the only way to take down a knight would be to penetrate in between the plates of the armor. these weak spots were covered my chain mail which could resist a solid blow of a sword or a slash, but a thrusting sword would go through it.
the fencer is what ultimately led to the demise of the knight. fencers wore min armor so they could move fast and the thin blade was meant to piece those weak spots in the armor easier than a traditional sword. A stab around the arm pit region could penetrate the heart.

just some fun facts for yea.
modern shark proof chain mail is prob made of Kevlar or stainless steal or something even better

I'm pretty sure plate became obsolete when black powder arms became too efficient against it, not because of fencers.