Decades: 320s BC 310s BC 300s BC 290s BC 280s BC - **270s BC** - 260s BC 250s BC 240s BC 230s BC 220s BC

284 BC 283 BC 282 BC 281 BC 280 BC - **279 BC** - 278 BC 277 BC 276 BC 275 BC

- Gauls led by Brennus try to sack Delphi but are defeated by combined Greek forces. They retreat to the North, cross the Bosporus, and finally settle in the region of Asia Minor that is later named Galatia.
- Battle of Ausculum between Rome and Pyrrhus of Epirus.