Comment by jltsiren

They were at least 2000 years behind Europe in weapons and armor technology. Some cultures had bronze weapons, but no iron smelting or steel.

Even before muskets started becoming common, European professional infantry had largely abandoned shields. Mass produced plate armor provided sufficient protection from arrows, and two-handed pikes were better than a pike and a shield.

On the other hand, bows became more effective again as muskets improved. When a musket could penetrate any reasonable armor, personal protection became less important.