Decades: 440s BC 430s BC 420s BC 410s BC 400s BC - **390s BC** - 380s BC 370s BC 360s BC 350s BC 340s BC

Years: 399 BC 398 BC 397 BC 396 BC 395 BC - **394 BC** - 393 BC 392 BC 391 BC 390 BC 389 BC

- Battle of Coronea: Agesilaus, king of Sparta, defeats a Greek coalition army
- Battle of Cnidus: The Spartan fleet under Peisander is utterly destroyed by the Persian-Athenian fleet of Conon

- Alexis, comic poet