| Millennia: | 1st millennium BC |
| Centuries: | 6th century BC - 5th century BC - 4th century BC |
| Decades: | 430s BC 420s BC 410s BC - 400s BC - 390s BC 380s BC 370s BC |
| Years: | 409 BC 408 BC 407 BC 406 BC 405 BC 404 BC 403 BC 402 BC 401 BC 400 BC |
| Categories: | Births - Deaths - State leaders - Sovereign states Establishments - Disestablishments |
Events and trends
- 404 BC — The Peloponnesian War ends with the defeat of Athens by Sparta
- In Roman times, after Lysimachus' conquest, Colophon failed to recover (unlike Lebedos) and lost its importance; in actual fact, the name was transferred to the site of the port village of Notium, and the latter name disappeared between the Peloponnesian War and the time of Cicero (late 400s BC to 1st century BC).
Deaths
- Theramenes
- Alcibiades, Athenian politician
- Darius II, emperor of Persia
