Centuries: 6th century BC -

**5th century BC**- 4th century BC

Decades: 470s BC 460s BC 450s BC 440s BC 430s BC - **420s BC** - 410s BC 400s BC 390s BC 380s BC 370s BC

429 BC 428 BC 427 BC 426 BC 425 BC 424 BC 423 BC 422 BC 421 BC 420 BC

**Events and Trends**

**Significant People**