Centuries: 5th century BC - 4th century BC - 3rd century BC

Decades: 360s BC 350s BC 340s BC 330s BC 320s BC 310s BC 300s BC 290s BC 280s BC 270s BC 260s BC

321 BC 320 BC 319 BC 318 BC 317 BC 316 BC 315 BC 314 BC 313 BC 312 BC 311 BC

Events

• Battle of Lautulae , the Romans are defeated by the Samnites.

Births

• Arsinoe II of Egypt

Deaths

• Eumenes of Cardia (executed)
• Olympias, mother of Alexander the Great (executed)