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221 BCE
The Chinese bronze age ends
The state of Qi – by now the only other independent state in China – surrenders to the state of Qin without a fight. https://en.wikipedia.org/wiki/221_BC -
207 BCE
Emperor Qin Er Shi of the Qin Dynasty is assassinated by his chief eunuch Zhao Gao.
He is replaced by his nephew Ziying, who in turn assassinates Zhao Gao. https://en.wikipedia.org/wiki/207_BC -
37
Emperor Han achieved national unity.
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207
Cao Cao defeats the Wuhuan tribes at the Battle of White Wolf Mountain, sending the Wuhuan into decline.
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280
Emperor Wu of the Jin dynasty completes the unification of China
The Jin dynasty's capital of Luoyang becomes a thriving centre of commerce as foreign diplomats and traders travel there. https://en.wikipedia.org/wiki/280 -
589
The Chinese Empire is reunited under the leadership of Emperor Wéndi
who defeats the Chen forces at Jiankang (modern Nanjing), ending the Chen Dynasty (the last of the Southern Dynasties) that has ruled since 557. https://en.wikipedia.org/wiki/589