Joachim Meyer was a 16th century weapons expert who wrote a treatise on medieval weaponry.
On Youtube you can find SCORES of videos explaining and demonstrating the techniques described by Joachim Meyer in the staff, dagger, rapier, longsword, and several other weapons.
This can be used to enhance your combat and roleplay with emotes and other flavor. Plus they're just fun fuel for the imagination.
Here's a sample. Enjoy!
https://www.youtube.com/watch?v=GD93F03suMc