During this time, the start of the development of human technology can produce metal smelting iron up to make tools available. The steel production requires a high temperature process is cumbersome. But to do it with the strength of steel more durable than bronze society in development of iron. It can develop into a state. The steel production of society can easily produce weapons and stronger. It can extend the army And have the right tools to do less durable than steel production technology development, causing an increase in productivity. Steel production, strong armed forces. Contribute to social development into a state with a strong military occupation of other societies. Expand an empire in the future.
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