Hieronymus, the grandson and successor of Hiero, thought fit to ally himself with Carthage.

The young tyrant, who was arrogant and cruel, was assassinated after reigning a few months.
The Roman Governor of Sicily, MARCELLUS, troubled by the Carthaginian faction in Syracuse, threatened the city with an attack unless the leaders of this faction were expelled.

In return, they endeavored to arouse the citizens of the neighboring city of Leontini against Rome and the Roman party in Syracuse.

Marcellus at once attacked and stormed Leontini.

The Syracusans then closed their city gates against him.