Decades: 390s BC - 380s BC - 370s BC - 360s BC - 350s BC - **340s BC** - 330s BC - 320s BC - 310s BC - 300s BC - 290s BC

347 BC 346 BC 345 BC 344 BC 343 BC **342 BC** 341 BC 340 BC 339 BC 338 BC 337 BC

**Events**

- Battle of Mount Gaurus: Roman general Marcus Valerius Corvus defeats the Samnites
- Alexander I becomes king of Epirus