With that said, knowing Western designs of weapons is also extremely interesting. The progression of simple sword -> sword+crossbar -> sword+ crossbar + ring guard -> Rapier -> Basket-hilted sword says a lot about Western Martial Arts (aka: Fencing).
At some point, people figured out that grabbing the crossbar was more comfortable and more precise. So additional protections needed to be added to the top of swords (finger-rings / sweepings).
The full anatomy of the Rapier is astonishing. Every part of the weapon serves a purpose.
Even then, Rapiers were mostly status symbols for the rich. Weapons of War were far more simple and practical. (Well... not always: Landsknechte Zweihander == lulz. They probably discontinued that weapon because it was too expensive, heavy, and unweildly. But man, what an awesome looking sword )