: 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: 409 BC 408 BC 407 BC 406 BC 405 BC - 404 BC - 403 BC 402 BC 401 BC 400 BC 399 BC
- Athens capitulates to Sparta. End of the Peloponnesian War.
- Amyrtaeus declares himself king of Egypt, revolting against his Persian overlords. This is considered the end of the Twenty-seventh Dynasty and start of Twenty-eighth Dynasty.
- Artaxerxes II succeeds his father Darius II as emperor of Persia.