The Partition of Jin opens the Warring States
Three noble houses split a great state and become kings
Three houses — Han, Zhao and Wei — gradually divided the lands of the mighty state of Jin, and in 403 BC the Zhou king recognised their rulers as marquesses. The year is often taken as the start of the Warring States period, and the three states soon divided the rest of Jin.
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Meanwhile around the world (±25 years)
Europe
- 415 BC–413 BC The Athenian Sicilian Expedition — 12 years earlier
- c. 387 BC Plato founds the Academy — 16 years later
Alive at the time
- Socrates (aged 67)
- Plato (aged 25)
- Hippocrates (aged 57)
- Democritus (aged 57)
- Aspasia (aged 67)
- Mozi (aged 67)
- Antisthenes (aged 42)
- Diogenes of Sinope (aged 9)