405 BCCenturies: 6th century BC - 5th century BC - 4th century BC
- Battle of Aegospotami: Spartan commander Lysander destroys the Athenian fleet.
- Spartan king Pausanius lays siege to Athens.
- Hannibal Mago leads his second expedition to Sicily; the Siege of Agrigentum fails to secure the island for Carthage
- Himilco succeeds Hannibal Mago as king of Carthage