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420 BC

Centuries: 6th century BC - 5th century BC - 4th century BC

Decades: 470s BC 460s BC 450s BC 440s BC 430s BC - 420s BC - 410s BC 400s BC 390s BC 380s BC 370s BC

Years: 425 BC 424 BC 423 BC 422 BC 421 BC - 420 BC - 419 BC 418 BC 417 BC 416 BC 415 BC

Births

Deaths

Herodotus, Greek historian (approximate year)

Events

Athens, Argus, Mantinea[?] and Elis ally against Sparta

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