Centuries: 6th century BC - 5th century BC - 4th century BC
Decades: 450s BC 440s BC 430s BC 420s BC 410s BC - 400s BC - 390s BC 380s BC 370s BC 360s BC 350s BC
Years: 411 BC 410 BC 409 BC 408 BC 407 BC - 406 BC - 405 BC 404 BC 403 BC 402 BC 401 BC
- Battle of Ephesus - The Spartans under Lysander defeat part of the Athenian fleet.
- Battle of Arginusae - Athens defeats the Spartan fleet in their last victory of the Peloponnesian War
- Agrigentum is taken by the Carthaginians.