The Romans too were well aware of the conflict which awaited them. In order first of all to secure the fidelity of their allies or, in other words, of their subjects, the towns that could not be depended on were garrisoned, and the leaders of the party of independence, where it seemed needful, were arrested or executed: such was the case with a number of the members of the senate of Praeneste. For the war itself great exertions were made; a war contribution was levied; the full contingent was called forth from all their subjects and allies; even the proletarians who were properly exempt from obligation of service were called to arms. A Roman army remained as a reserve in the capital. A second advanced under the consul Tiberius Coruncanius into Etruria, and dispersed the forces of Volci and Volsinii. The main force was of course destined for Lower Italy; its departure was hastened as much as possible, in order to reach Pyrrhus while still in the territory of Tarentum, and to prevent him and his forces from forming a junction with the Samnites and other south Italian levies that were in arms against Rome. The Roman garrisons, that were placed in the Greek towns of Lower Italy, were intended temporarily to check the king's progress. But the mutiny of the troops stationed in Rhegium--one of the legions levied from the Campanian subjects of Rome under a Campanian captain Decius--deprived the Romans of that important town. It was not, however, transferred to the hands of Pyrrhus. While on the one hand the national hatred of the Campanians against the Romans undoubtedly contributed to produce this military insurrection, it was impossible on the other hand that Pyrrhus, who had crossed the sea to shield and protect the Hellenes, could receive as his allies troops who had put to death their Rhegine hosts in their own houses. Thus they remained isolated, in close league with their kinsmen and comrades in crime, the Mamertines, that is, the Campanian mercenaries of Agathocles, who had by similar means gained possession of Messana on the opposite side of the straits; and they pillaged and laid waste for their own behoof the adjacent Greek towns, such as Croton, where they put to death the Roman garrison, and Caulonia, which they destroyed. On the other hand the Romans succeeded, by means of a weak corps which advanced along the Lucanian frontier and of the garrison of Venusia, in preventing the Lucanians and Samnites from uniting with Pyrrhus; while the main force--four legions as it would appear, and so, with a corresponding number of allied troops, at least 50,000 strong--marched against Pyrrhus, under the consul Publius Laevinus. Battle near Heraclea