(2nd millennium BC - 1st millennium BC - 1st millennium) 3rd century BC - Events. The first two Punic Wars between Carthage and Rome over dominance in western Mediterranean Rome conquers Spain Gaulish migration to Macedon, Thrace and Galatia 281 BC Antiochus I Soter, on the assassination of his father Seleucus becomes emperor of the Seleucid empire. 273 BC to 252 BC Ashoka the Great ruled the Mauryan Empire 261 BC Antiochus II Theos, 2nd son, at the death o ...

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• 3rd century BC - Events
• 3rd century BC - Significant persons
• 3rd century BC - Inventions discoveries introductions
• 3rd century BC - Decades and years

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