Main Page | See live article | Alphabetical index 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: 431 BC 430 BC 429 BC 428 BC 427 BC - 426 BC - 425 BC 424 BC 423 BC 422 BC 421 BC Events Battle of Tanagra - Athenians under Nicias are defeated in an invasion of Boeotia Battle of Olpae - Athenians under Demosthenes defeat the Spartans in Aetolia Major earthquake in Athens Births Deaths Herodotus of Halicarnassos Zhou kao wang, King of the Zhou Dynasty of China This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.