Decades: 380s BC 370s BC 360s BC 350s BC 340s BC - **330s BC** - 320s BC 310s BC 300s BC 290s BC 280s BC

Years: 344 BC 343 BC 342 BC 341 BC 340 BC - **339 BC** - 338 BC 337 BC 336 BC 335 BC 334 BC

- Battle of Vesuvius: Romans under P. Decius Mus are defeated by the rebellious Latins.

- Speusippus - head of Plato's Academy