Centuries: 4th century BC -

**3rd century BC\**- 2nd century BC

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

Years: 257 BC 256 BC 255 BC 254 BC 253 BC - **252 BC** - 251 BC 250 BC 249 BC 248 BC 247 BC

**Births**

**Deaths**

**Events**

- Annam: Thuc dynasty replaces Hong-ban-thi dynasty