At the moment I'm trying to differentiate from some still-standing myths (Like, the fact that a battle axe is a two handed weapon while the war axe is a single handed weapon), add in a range of gunpowder weapons and some racial and cultural deviations on existing weapons. Then I'll basically go over how weapons will affect things in-game - and why it may be a bad idea to use a rapier against a knight. And I'll bring back the tactical effectiveness of armor versus unarmored battle.