In Italy (B.C. 212) the two Consuls Appius Claudius and Q. Fulvius began to draw together their forces for the purpose of besieging Capua. Hannibal advanced to relieve it, and compelled the Consuls to withdraw; but he was unable to force either of them to fight. Shortly afterward he returned again to the south to urge on the siege of the citadel of Tarentum, which still held out; and he spent the winter and the whole of the ensuing spring (B.C. 211) in its immediate neighborhood. But during his absence the Consuls had renewed the siege of Capua, and prosecuted it with such activity, that they had succeeded in surrounding the city with a double line of intrenchments. The pressing danger once more summoned Hannibal to its relief. He accordingly presented himself before the Roman camp, and attacked their lines from without, while the garrison co-operated with him by a vigorous sally from the walls. Both attacks were however repulsed, and Hannibal, foiled in his attempt to raise the siege by direct means, determined on the bold manœuvre of marching directly upon Rome itself, in hopes of thus compelling the Consuls to abandon their designs upon Capua, in order to provide for the defense of the city. But this daring scheme was again frustrated; the appearance of Hannibal before the gates of Rome for a moment struck terror through the city; but a considerable body of troops was at the time within the walls; and the Consul Fulvius, as soon as he heard of Hannibal's march, hastened, with a portion of the besieging army, from Capua, while he still left with the other Consul a force amply sufficient to carry on the siege. Hannibal was thus disappointed in the main object of his advance, and he had no means of effecting any thing against Rome itself, where Fulvius and Fabius confined themselves strictly to the defensive, allowing him to ravage the whole country without opposition, up to the very walls of Rome. Nothing therefore remained for him but to retreat, and he accordingly recrossed the Anio, and marched slowly and sullenly through the land of the Sabines and Samnites, ravaging the country which he traversed. From thence he retired to the Bruttii, leaving Capua to its fate. The city soon after surrendered to the Romans. Its punishment was terrible. All the leaders of the insurrection were beheaded; the chief men were imprisoned; and the rest of the people were sold. The city and its territory were confiscated, and became part of the Roman domain.
The commencement of the next season (B.C. 210) was marked by the fall of Salapia, which was betrayed by the inhabitants to Marcellus; but this loss was soon avenged by the total defeat and destruction of the army of the Proconsul Cn. Fulvius at Herdonea. The Consul Marcellus, on his part, carefully avoided an action for the rest of the campaign, while he harassed his opponent by every possible means. Thus the rest of that summer too wore away without any important results. But this state of comparative inactivity was necessarily injurious to the cause of Hannibal; the nations of Italy that had espoused that cause when triumphant now began to waver in their attachment; and in the course of the following summer (B.C. 209) the Samnites and Lucanians submitted to Rome, and were admitted to favorable terms. A still more disastrous blow to the Carthaginian cause was the loss of Tarentum, which was betrayed into the hands of Fabius, as it had been into those of Hannibal. In vain did the latter seek to draw the Roman general into a snare; the wary Fabius eluded his toils. The recovery of Tarentum was the last exploit in the military life of the aged Fabius, and was a noble completion to his long list of achievements. From the time of the battle of Cannæ he had directed almost exclusively the councils of his country, and his policy had been pre-eminently successful; but the times now demanded bolder measures, and something else was necessary than the caution of the Lingerer to bring the war to a close.
After the fall of Tarentum Hannibal still traversed the open country unopposed, and laid waste the territories of his enemies. Yet we can not suppose that he any longer looked for ultimate success from any efforts of his own; his object was doubtless now only to maintain his ground in the south until his brother Hasdrubal should appear in the north of Italy, an event to which he had long anxiously looked forward. Yet the following summer (B.C. 208) was marked by some brilliant achievements. The two Consuls, Crispinus and Marcellus, who were opposed to Hannibal in Lucania, allowed themselves to be led into an ambush, in which Marcellus was killed, and Crispinus mortally wounded. Marcellus was one of the ablest of the Roman generals. Hannibal displayed a generous sympathy for his fate, and caused due honors to be paid to his remains.
The following year (B.C. 207) decided the issue of the war in Italy. The war in Spain during the last few years had been carried on with brilliant success by the young P. Scipio, of whose exploits we shall speak presently. But in B.C. 208, Hasdrubal, leaving the two other Carthaginian generals to make head against Scipio, resolved to set out for Italy to the assistance of his brother. As Scipio was in undisputed possession of the province north of the Iberus, and had secured the passes of the Pyrenees on that side, Hasdrubal crossed these mountains near their western extremity, and plunged into the heart of Gaul. After spending a winter in that country, he prepared to cross the Alps in the spring of B.C. 207, and to descend into Italy. The two Consuls for this year were C. Claudius Nero and M. Livius. Nero marched into Southern Italy to keep a watch upon Hannibal; Livius took up his quarters at Ariminum to oppose Hasdrubal. The latter experienced little loss or difficulty in crossing the Alps. The season of the year was favorable, and the Gauls were friendly to his cause. But instead of pushing on at once into the heart of Italy, he allowed himself to be engaged in the siege of Placentia, and lost much precious time in fruitless efforts to reduce that colony. When at length he abandoned the enterprise, he sent messengers to Hannibal to apprize him of his movements, and concert measures for their meeting in Umbria. But his dispatches fell into the hands of the Consul Nero, who formed the bold resolution of instantly marching with a picked body of 7000 men to join his colleague, and fall upon Hasdrubal with their united forces before Hannibal could receive any information of his brother's movements. Nero executed his design with equal secrecy and rapidity. Hannibal knew nothing of his departure, and in a week's time Nero marched 250 miles to Sena, where his colleague was encamped in presence of Hasdrubal. He entered the camp of Livius in the night, that his arrival might not be known to the Carthaginians. After a day's rest the two Consuls proceeded to offer battle; but Hasdrubal, perceiving the augmented numbers of the Romans, and hearing the trumpet sound twice, felt convinced that the Consuls had united their forces, and that his brother had been defeated. He therefore declined the combat, and in the following night commenced his retreat toward Ariminum. The Romans pursued him, and he found himself compelled to give them battle on the right bank of the Metaurus. On this occasion Hasdrubal displayed all the qualities of a consummate general; but his forces were greatly inferior to those of the enemy, and his Gaulish auxiliaries were of little service. The gallant resistance of the Spanish and Ligurian troops is attested by the heavy loss of the Romans; but all was of no avail, and seeing the battle irretrievably lost, he rushed into the midst of the enemy, and fell, sword in hand, in a manner worthy of the son of Hamilcar and the brother of Hannibal. The Consul Nero hastened back to Apulia almost as speedily as he had come, and announced to Hannibal the defeat and death of his brother by throwing into his camp the severed head of Hasdrubal. "I recognize," said Hannibal, sadly, "the doom of Carthage."
The victory of the Metaurus was, as we have already said, decisive of the fate of the war in Italy, and the conduct of Hannibal shows that he felt it to be such. From this time he abandoned all thoughts of offensive operations, and, withdrawing his garrisons from Metapontum and other towns that he still held in Lucania, collected together his forces within the peninsula of the Bruttii. In the fastnesses of that wild and mountainous region he maintained his ground for nearly four years, while the towns that he still possessed on the coast gave him the command of the sea.