264. The first Punic war begins. Its primary cause was the desire of both the Romans and the Carthaginians to possess themselves of Sicily. The Romans form a fleet, and successfully compete with the marine of Carthage. [There is at this present moment [written in June, 1851] in the Great Exhibition at Hyde Park a model of a piratical galley of Labuan, part of the mast of which can be let down on an enemy, and form a bridge for boarders. It is worth while to compare this with the account in Polybius of the boarding bridges which the Roman admiral Dullius, affixed to the masts of his galleys and by means of which he won his great victory over the Carthaginian fleet.] During the latter half of the war, the military genius of Hamilcar Barca sustains the Carthaginian cause in Sicily. At the end of twenty-four years, the Carthaginians sue for peace, though their aggregate loss in ships and men had been less than that sustained by the Romans since the beginning of the war. Sicily becomes a Roman province. 240 to 218. The Carthaginian mercenaries who had been brought back from Sicily to Africa, mutiny against Carthage, and nearly succeed in destroying her. After a sanguinary and desperate struggle, Hamilcar Barca crushes them. During this season of weakness to Carthage, Rome takes from her the island of Sardinia. Hamilcar Barca forms the project of obtaining compensation by conquests in Spain, and thus enabling Carthage to renew the struggle with Rome. He takes Hannibal (then a child) to Spain with him. He and, after his death, his brother, win great part of southern Spain to the Carthaginian interest. Hannibal obtains the command of the Carthaginian armies in Spain, 221 B.C., being then twenty-six years old. He attacks Saguntum, a city on the Ebro in alliance with Rome, which is the immediate pretext for the second Punic war. During this interval Rome had to sustain a storm from the north. The Cisalpine Gauls, in 226, formed an alliance with one of the fiercest tribes of their brethren north of the Alps, and began a furious war against the Romans, which lasted six years. The Romans gave them several severe defeats, and took from them part of their territories near the Po. It was on this occasion that the Roman colonies of Cremona and Placentia were founded, the latter of which did such essential service to Rome in the second Punic war, by the resistance which it made to the army of Hasdrubal. A muster-roll was made in this war of the effective military force of the Romans themselves, and of those Italian states that were subject to them. The return showed a force of seven hundred thousand foot, and seventy thousand horse. Polybius mentions this muster. 228. Hannibal crosses the Alps and invades Italy. CHAPTER IV. -- THE BATTLE OF THE METAURUS, B.C. 207. Quid debeas, O Roma, Neronibus, Testis Metaurum flumen, et Hasdrubal Devictus, et pulcher fugatis Ille dies Latio tenebris,