: 5th century BC
- 4th century BC
- 3rd century BC
Decades: 420s BC 410s BC 400s BC 390s BC 380s BC - 370s BC - 360s BC 350s BC 340s BC 330s BC 320s BC
378 BC 377 BC 376 BC 375 BC 374 BC - 373 BC - 372 BC 371 BC 370 BC 369 BC 368 BC
- The Persian army, under the generals Iphicrates and Pharnabazes, attempted to reconquer Egypt, but due to mutual distrust king Nectanebo I was able to gather his forces and repulse their invasion.
- The ancient Greek city of Helike was destroyed by a massive earthquake and tidal wave.