Qin Unification of China
By 221 BCE the state of Qin, occupying China's western frontier and governed since Shang Yang's 4th-century reforms by uncompromising Legalist principles — universal conscription, standardised law, and reward tied strictly to military merit — had spent decades systematically conquering its six rival Warring States: Han, Zhao, Wei, Chu, Yan, and finally Qi. King Zheng of Qin, who had ascended the Qin throne as a boy in 246 BCE, directed the final campaigns through the 230s and 220s BCE. Qin's disciplined conscript armies, iron weapons, and administrative capacity to sustain prolonged campaigns overwhelmed rivals still organised along older aristocratic lines. Qi, the wealthy eastern state, surrendered without a major battle in 221 BCE, completing the unification. Zheng declared himself Qin Shi Huang ('First Emperor of Qin'), rejecting the old Zhou title of 'king' as inadequate to his achievement. He abolished the remaining feudal states and imposed direct rule through appointed provincial administrators (the commandery-county system), standardised weights, measures, currency, and — critically — the Chinese script, ensuring that peoples who had been politically and linguistically fragmented for centuries could now be governed, and later understand each other, as one civilisation.
- Year: 221 BCE
- Category: Military
