Because other people learned to make iron weapons and fought back.
Bronze weapon technology had a moat because it required scarce, imported resources. Even if they learned the techniques, most people couldn't make them.
The resources for iron weaponry were readily available; they just needed to learn the techniques.
Bronze weapon technology had a moat because it required scarce, imported resources. Even if they learned the techniques, most people couldn't make them.
The resources for iron weaponry were readily available; they just needed to learn the techniques.