One of the under-appreciated swords is the Macana. In essence, a Mezoamerican weapon of a wooden sword with extremely sharp pieces of obsidian embedded in it. As with other swords, it was optimized for its time and place.
Importantly, more typical spear and sword technology was known, but the embedded obsidian blades were preferred. They even used a spear head that was a smaller version of the Macana. But they also had more typical stone spearheads, and pencil-like poking spear heads made from copper.
They also didn’t have to worry about smacking volcanic glass blades into plate armor or mail, at least not until the Spanish arrived. Aztec and Inca armor was made of quilted cotton.