260s BC

• The Mamertines, a body of Campanian mercenaries who have been employed by Agathocles, the former tyrant of Syracuse, capture the stronghold of Messana (Messina in north-eastern Sicily), from which they harass the Syracusans. The Syracusan military leader, Hieron, defeats them in a pitched battle at the Longanus River near Mylae, but Carthaginian forces intervene to prevent him from capturing Messana. His grateful countrymen then choose Hieron as their king and tyrant, to be known as Hieron II.

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