The Senate hesitated; but public opinion carried the day, and, in spite of the little interest inspired by the Mamertines, war was decided. A body of troops, sent without delay to Messina, expelled the Carthaginians. Soon after, a consular army crossed the Strait, defeated first the Syracusans and then the Carthaginians, and effected a military settlement in the island. Thus commenced the first Punic War.
Different circumstances favoured the Romans. The Carthaginians had made themselves objects of hatred to the Sicilian Greeks. The towns still independent, comparing the discipline of the legions with the excesses of all kinds which had marked the progress of the mercenaries of Agathocles, Pyrrhus, and the Carthaginian generals, received the consuls as liberators. Hiero, master of Syracuse, the principal town in Sicily, had no sooner experienced the power of the Roman armies than he foresaw the result of the struggle, and declared for the strongest. His alliance, maintained faithfully during fifty years, was of great utility to the Republic.[488] With his support, the Romans, at the end of the third year of the war, had obtained possession of Agrigentum and the greater part of the towns of the interior; but the fleets of the Carthaginians remained masters of the sea and of the fortresses on the coast.
The Romans were deficient in ships of war.[489] They could, no doubt, procure transport vessels, or, by their allies (_socii navales_), a few triremes,[490] but they had none of those ships with five ranks of oars, better calculated, by their weight and velocity, to sink the ships of the enemy. An incomparable energy supplied in a short time the insufficiency of the fleet: a hundred and twenty galleys were constructed after the model of a Carthaginian quinquireme which had been cast on the coast of Italy; and soldiers were exercised on land in the handling of the oar.[491] At the end of two months, the crews were embarked, and the Carthaginians were defeated at Mylæ (494), and three years after at Tyndaris (497). These two sea-fights deprived Carthage of the prestige of her maritime superiority.
Still the struggle continued on land without decisive results, when the two rivals embraced the same resolution of making a final effort for the mastery of the sea. Carthage fitted out three hundred and fifty decked vessels; Rome, three hundred and thirty of equal force. In 498 the two fleets met between Heraclea Minora and the Cape of Ecnomus, and, in a memorable combat, in which 300,000 men[492] contended, the victory remained with the Romans. The road to Africa was open, and M. Atilius Regulus, inspired, no doubt, by the example of Agathocles, formed the design of carrying the war thither. His first successes were so great, that Carthage, in her terror, and to avoid the siege with which she was threatened, was ready to renounce her possessions in Sicily. Regulus, relying too much on the feebleness of the resistance he had hitherto encountered, thought he could impose upon Carthage the hardest conditions; but despair restored to the Africans all their energy, and Xanthippus, a Greek adventurer, but good general, placed himself at the head of the troops, defeated the consul, and almost totally destroyed his army.