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Well, the Han dynasty was the dynasty where gunpowder, weapons such as guns were invented. the Chinese had wars with Mongolia mostly (north) so they built the great wall,

when the Mongolians tried to bring it down, the Chinese got hot lava and poured it on them from the top of the great wall. the great wall had a watch tower every 100 ft, making it practically impossible to get past.

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16y ago

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