450s BC

• The Jewish priest Ezra assembles and leads a band of approximately 5,000 Jews from Babylon to Jerusalem.

• Athens allies itself with the city state of Megara which is under pressure from Corinth. This alliance leads to war between Corinth and Athens. The first battle of the war, at Haliesis in the Gulf of Argolis, results in a Corinthian victory, but the next battle, at Cecryphalea (modern Angistrion), goes Athens' way.

• The Aequi occupy Tusculum. In response to the threat, the Roman Senate decide to send an army to help the allied city, under the command of consul Lucius Cornelius Maluginensis. In addition, the consul Fabius Vibulanus, who was at that point besieging Antium, moves his forces to attack Tusculum. The Tusculans are able to recapture their city. A truce is then arranged with the Aequi.

• The Sicilian town of Morgantina is destroyed by Ducetius, hellenised leader of the Siculi (according to Diodorus Siculus).

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