Decades: 300s BC 290s BC 280s BC 270s BC 260s BC - **250s BC** - 240s BC 230s BC 220s BC 210s BC 200s BC

Years: 256 BC 255 BC 254 BC 253 BC 252 BC - **251 BC** - 250 BC 249 BC 248 BC 247 BC 246 BC

- Alexander of Sicyon freed his city from Spartan control, then united it to the Achaean League.
- First Punic War: Battle of Panormus - Carthaginian forces under Hasdrubal are defeated by the Romans under L. Caecilius Metellus.