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481/403-221 BCEReputable source · 2 sourcesWell documented

Seven States Fight the Warring States Period

Three centuries of war between rival kingdoms sets up China's first unification

On the timeline · around 481/403-221 BCE · Ancient DynastiesAncient DynastiesEmpire and Golden AgesSeven States Fight the Warring States Period900 BCE800 BCE700 BCE600 BCE500 BCE400 BCE300 BCE200 BCE100 BCE

Quick facts

Period
481/403-221 BCE
Seven major states
Chu, Han, Qi, Qin, Wei, Yan, Zhao
Outcome
Qin defeats all six rivals, 230-221 BCE
Key text
The Art of War (5th century BCE)

What happened

By the early 4th century BCE, nearly a hundred small Zhou-era states had been absorbed by conquest into seven major rivals: Chu, Han, Qi, Qin, Wei, Yan, and Zhao. These states spent roughly three centuries in the Warring States period fighting for territorial dominance while Zhou kings retained no real power at all. The constant warfare pushed rapid change in every direction, larger armies, new infantry and cavalry tactics, and, alongside the fighting, real advances in commerce, agriculture, and philosophy that built directly on the era's Hundred Schools of Thought.

Why it matters

The relentless competition rewarded whichever state organized itself most efficiently for war, and it was Qin, having adopted Legalist administrative reforms, that eventually defeated all six rivals in succession between 230 and 221 BCE. The period's brutality and its innovations both fed directly into the unification that ended it and the empire that followed.

How we know

The Warring States period is documented through surviving state chronicles, military treatises such as the Art of War, and the histories later Han-dynasty scholars compiled from earlier state records.

Sources

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Seven States Fight the Warring States Period · History of China · SourcedStory