312 BC

Centuries:	5th century BC · 4th century BC · 3rd century BC
Decades:	340s BC 330s BC 320s BC 310s BC 300s BC 290s BC 280s BC
Years:	315 BC 314 BC 313 BC 312 BC 311 BC 310 BC 309 BC

[edit] Events

In the Third war of the Diadochi, Ptolemy I Soter meets a force under Antigonus's son Demetrius at Gaza, where they fight an inconclusive battle.
Ptolemy proceeds to invade Syria, but withdraws when Antigonus himself arrives with reinforcements.
Seleucus I returns to Babylon, marking the beginning of the Seleucid Empire and year 1 of the Seleucid era.

Construction starts of the Via Appia
Rome's first aqueduct is finished, enabling inhabitants of the city to get pure drinking water for the first time.