into the city of Messana, but treacherously massacred the citizens, taking their wives and property for their own. 2 Using the city as base they raided the neighbouring territories, forcing other communities to pay them tribute and exploiting the confused situation on the island. Emphasizing their martial strength, the mercenaries styled themselves Mamertines, followers of Mamers the Italian war god whom the Romans worshipped as Mars.
Messana lay on the north-eastern coast of Sicily, commanding one side of the narrow Straits between the island and Italy. On the Italian shore lay Rhegium, a Roman ally which had requested a Roman garrison to defend it against Pyrrhus. 3 The Romans duly despatched 4,000 men led by one Decius, an officer of uncertain rank. Although Roman citizens in every respect save that they lacked the right to vote at Rome (civites sine suffra gio), these soldiers were also Oscan-speaking Campanians. Inspired by their kindred at Messana, they too turned upon the city they were supposed to protect, killing or expelling its male citizens and stealing their possessions. At the time, the Romans were occupied by the wars with Pyrrhus and Tarentum, and were unable to avenge this breach of their faith, so that it was not until 271 that an army went south and began the siege of Rhegium.
The defeat of Tarentum had confirmed Roman control over the predominantly Greek southern Italy, making it all the more important to demonstrate to their new allies that such abuses of Rome's fides (faith) would not escape punishment. Rhegium was captured after a long siege and the 300 Campanians taken alive were sent to Rome for public punishment. There, as befitted citizens who had turned against the State, they were flogged and beheaded in the Forum. One source claims that Decius, who had lost his sight, was negligently guarded and managed to commit suicide before enduring this punishment. 4 As yet the Romans had no connection or contact with Messana.
The Mamertines had not joined Pyrrhus' campaign against Carthage when he answered the call of Syracuse to defend the Greeks cities on the island and made his short, spectacular, but ultimately unsuccessful foray into Sicily. However, deprived of their allies across the Straits they came under increasing pressure as a new leader emerged at Syracuse. Hiero was a skilled soldier and a shrewd politician whose popularity was based upon his campaigns against the Italian raiders. Initially elected to power by the army, Hiero made his position more stable by marrying the daughter of one of the city's leading politicians. The precise chronology of Hiero's campaigns against the Mamertines is very uncertain, but need not concern us here. In an initial battle at the River Cyamosorus he seems to have checked them, as well as allegedly taking the opportunity to sacrifice a contingent of unreliable mercenaries. Later, probably sometime between 268 and 265, Hiero won a decisive victory at the River Longanus, an action in which a body of the original citizens of Messana and a picked unit from Syracuse were concealed in ambush behind the enemy line. 5
The power of the Mamertines was broken, and seeing no prospect of salvation without external aid, their leaders, or different factions within the leadership according to Polybius, sent embassies appealing for assistance to both Carthage and Rome in 265. Once again the precise chronology of these events is unclear. What we do know is that the Carthaginians were the first to respond, one of their commanders in Sicily dispatching a token force to occupy Messana's citadel. In one version of the story, this officer, Hannibal, happened to be with a naval squadron off the nearby Lipari Islands. He rushed to Hiero's camp, ostensibly to congratulate him on his victory, but in fact to delay his advance for long enough to persuade the Mamertines to accept an alliance and insert a Carthaginian garrison. Hiero was not willing to commence open hostilities with the
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