475 BCE – 221 BCE · Various Chinese states vs Qin vs Qi vs Chu
Seven centuries of incessant warfare between Chinese states (475-221 BCE) killed millions, industrialized battle, and created political philosophy that shaped civilizations.
The Warring States Period (475-221 BCE) saw hundreds of Chinese states fighting for supremacy. Warfare became increasingly sophisticated: iron weapons replaced bronze; large standing armies emerged; infantry tactics evolved. Sun Tzu's 'Art of War' was written during this period, codifying strategy. States conducted total warfare, enslaving populations and scorching farmland. Qin's superior Legalist philosophy and iron weapons ultimately prevailed, conquering all rivals (230-221 BCE). Millions died through 250+ years of intermittent warfare; populations in conquered territories collapsed.
The Warring States Period's martial innovations (iron weapons, mass armies, supply logistics) defined military practice for millennia. Sun Tzu's strategic philosophy became foundational to global military thought—still taught at war colleges. The period's political fragmentation ended with Qin unification, demonstrating that centralized bureaucratic states could overcome feudal fragmentation. Eastern martial arts and statecraft traditions trace to this period. The philosophical schools (Confucianism, Daoism, Legalism) developed partly in response to the period's chaos.
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