Hannibal, who had lost a whole year through the obstinate resistance of the Saguntines, had as usual retired for the winter of 535-6 to Cartagena, to make all his preparations on the one hand for the attack of Italy, on the other for the defence of Spain and Africa; for, as he, like his father and his brother-in-law, held the supreme command in both countries, it devolved upon him to take measures also for the protection of his native land. The whole mass of his forces amounted to about 120,000 infantry and 16,000 cavalry; he had also 58 elephants, 32 quinqueremes manned, and 18 not manned, besides the elephants and vessels remaining at the capital. Excepting a few Ligurians among the light troops, there were no mercenaries in this Carthaginian army; the troops, with the exception of some Phoenician squadrons, consisted mainly of the Carthaginian subjects called out for service - Libyans and Spaniards. To insure the fidelity of the latter the general, who knew the men with whom he had to deal, gave them as a proof of his confidence a general leave of absence for the whole winter; while, not sharing the narrow-minded exclusiveness of Phoenician patriotism, he promised to the Libyans on his oath the citizenship of Carthage, should they return to Africa victorious. This mass of troops however was only destined in part for the expedition to Italy. Some 20,000 men were sent to Africa, the smaller portion of them proceeding to the capital and the Phoenician territory proper, the majority to the western point of Africa. For the protection of Spain 12,000 infantry, 2500 cavalry, and nearly the half of the elephants were left behind, in addition to the fleet stationed there; the chief command and the government of Spain were entrusted to Hannibal's younger brother Hasdrubal. The immediate territory of Carthage was comparatively weakly garrisoned, because the capital afforded in case of need sufficient resources; in like manner a moderate number of infantry sufficed for the present in Spain, where new levies could be procured with ease, whereas a comparatively large proportion of the arms specially African - horses and elephants - was retained there. The chief care was bestowed in securing the communications between Spain and Africa: with that view the fleet remained in Spain, and western Africa was guarded by a very strong body of troops. The fidelity of the troops was secured not only by hostages collected from the Spanish communities and detained in the stronghold of Saguntum, but by the removal of the soldiers from the districts where they were raised to other quarters: the east African militia were moved chiefly to Spain, the Spanish to Western Africa, the West African to Carthage. Adequate provision was thus made for defence. As to offensive measures, a squadron of 20 quinqueremes with 1000 soldiers on board was to sail from Carthage for the west coast of Italy and to pillage it, and a second of 25 sail was, if possible, to re-establish itself at Lilybaeum; Hannibal believed that he might count upon the government making this moderate amount of exertion. With the main army he determined in person to invade Italy; as was beyond doubt part of the original plan of Hamilcar. A decisive attack on Rome was only possible in Italy, as a similar attack on Carthage was only possible in Libya; as certainly as Rome meant to begin her next campaign with the latter, so certainly ought Carthage not to confine herself at the outset either to any secondary object of operations, such as Sicily, or to mere defence - defeat would in any case involve equal destruction, but victory would not yield equal fruit.

But how could Italy be attacked? He might succeed in reaching the peninsula by sea or by land; but if the project was to be no mere desperate adventure, but a military expedition with a strategic aim, a nearer basis for its operations was requisite than Spain or Africa. Hannibal could not rely for support on a fleet and a fortified harbour, for Rome was now mistress of the sea. As little did the territory of the Italian confederacy present any tenable basis. If in very different times, and in spite of Hellenic sympathies, it had withstood the shock of Pyrrhus, it was not to be expected that it would now fall to pieces on the appearance of the Phoenician general; an invading army would without doubt be crushed between the network of Roman fortresses and the firmly-consolidated confederacy. The land of the Ligurians and Celts alone could be to Hannibal, what Poland was to Napoleon in his very similar Russian campaigns. These tribes still smarting under their scarcely ended struggle for independence, alien in race from the Italians, and feeling their very existence endangered by the chain of Roman fortresses and highways whose first coils were even now being fastened around them, could not but recognize their deliverers in the Phoenician army (which numbered in its ranks numerous Spanish Celts), and would serve as a first support for it to fall back upon - a source whence it might draw supplies and recruits. Already formal treaties were concluded with the Boii and the Insubres, by which they bound themselves to send guides to meet the Carthaginian army, to procure for it a good reception from the cognate tribes and supplies along its route, and to rise against the Romans as soon as it should set foot on Italian ground. In fine, the relations of Rome with the east led the Carthaginians to this same quarter. Macedonia, which by the victory of Sellasia had re-established its sovereignty in the Peloponnesus, was in strained relations with Rome; Demetrius of Pharos, who had exchanged the Roman alliance for that of Macedonia and had been dispossessed by the Romans, lived as an exile at the Macedonian court, and the latter had refused the demand which the Romans made for his surrender. If it was possible to combine the armies from the Guadalquivir and the Karasu anywhere against the common foe, it could only be done on the Po. Thus everything directed Hannibal to Northern Italy; and that the eyes of his father had already been turned to that quarter, is shown by the reconnoitring party of Carthaginians, whom the Romans to their great surprise encountered in Liguria in 524.

The reason for Hannibal's preference of the land route to that by sea is less obvious; for that neither the maritime supremacy of the Romans nor their league with Massilia could have prevented a landing at Genoa, is evident, and was shown by the sequel. Our authorities fail to furnish us with several of the elements, on which a satisfactory answer to this question would depend, and which cannot be supplied by conjecture. Hannibal had to choose between two evils. Instead of exposing himself to the unknown and less calculable contingencies of a sea voyage and of naval war, it must have seemed to him the better course to accept the assurances, which beyond doubt were seriously meant, of the Boii and Insubres, and the more so that, even if the army should land at Genoa, it would still have mountains to cross; he could hardly know exactly, how much smaller are the difficulties presented by the Apennines at Genoa than by the main chain of the Alps. At any rate the route which he took was the primitive Celtic route, by which many much larger hordes had crossed the Alps: the ally and deliverer of the Celtic nation might without temerity venture to traverse it.

So Hannibal collected the troops, destined for the grand army, in Cartagena at the beginning of the favourable season; there were 90,000 infantry and 12,000 cavalry, of whom about two-thirds were Africans and a third Spaniards. The 37 elephants which they took with them were probably destined rather to make an impression on the Gauls than for serious warfare. Hannibal's infantry no longer needed, like that led by Xanthippus, to shelter itself behind a screen of elephants, and the general had too much sagacity to employ otherwise than sparingly and with caution that two-edged weapon, which had as often occasioned the defeat of its own as of the enemy's army. With this force the general set out in the spring of 536 from Cartagena towards the Ebro. He so far informed his soldiers as to the measures which he had taken, particularly as to the connections he had entered into with the Celts and the resources and object of the expedition, that even the common soldier, whose military instincts lengthened war had developed, felt the clear perception and the steady hand of his leader, and followed him with implicit confidence to the unknown and distant land; and the fervid address, in which he laid before them the position of their country and the demands of the Romans, the slavery certainly reserved for their dear native land, and the disgrace of the imputation that they could surrender their beloved general and his staff, kindled a soldierly and patriotic ardour in the hearts of all.