The history class in junior high school tells us that the popularization of iron weapons defeated the Bronze Age, but the real history is that the Qin State dominated the world, and most of the weapons were made of bronze.

It can also be seen from this that iron replaced bronze not because it was more advanced, but because it was cheaper.

With the unification of the country, the number of armies increased, and the more weapons were needed, and the production of copper could not keep up with consumption, which was the reason for the decline of bronze.

Copper in addition to the front

"Three Kingdoms: My Lady is Zhen Mi" Chapter 333 The End of Cao Wei is hitting in his hand, please wait a moment,

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