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

Years: 315 BC 314 BC 313 BC 312 BC 311 BC - 310 BC - 309 BC 308 BC 307 BC 306 BC 305 BC

• Battle of Lake Vadimo : The Romans defeat the Etruscans.
• Macedonian king Antigonus founded Antigonea , later known as Nicaea and Iznik (approximate year)
• Agathocles, tyrant of Syracuse, leads a counterstrike against Carthage
• Antigonia Troas (later known as Alexandria Troas) and Antigoneia (later known as Nicaea) are founded by Antigonus I of Macedon

Births

• Aratus, Macedonian Greek mathematician, astronomer, meteorologist, botanist and poet (possibly born in 315 BC)
• Aristarchus, Greek astronomer and mathematician

Deaths

• Kidinnu, Babylonian astronomer (approximate year).
• Heraclitus of Heraclea
• Pytheas, Greek merchant, geographer and explorer