The progress of the Carthaginians in Spain, and the state of their forces in that country, had alarmed the Senate, which, in 526, obliged the government of Carthage to subscribe to a new treaty, prohibiting the Punic army from passing the Ebro, and attacking the allies of the Republic.[509] This last article referred to the Saguntines, who had already had some disputes with the Carthaginians. The Romans affected not to consider them as aborigines, and founded their plea on a legend which represented this people as a colony from Ardea, contemporary with the Trojan war.[510] By a similar conduct Rome created allies in Spain to watch her old adversaries, and this time, as in the case of the Mamertines, she showed an interested sympathy in favour of a weak nation exposed to frequent collisions with the Carthaginians. Hasdrubal had received the order to carry into execution the new treaty; but he was assassinated by a Gaul, in 534, and the army, without waiting for orders from Carthage, chose by acclamation for its chief Hannibal, then twenty-nine years of age. In spite of the rival factions, this choice was ratified, and perhaps any hesitation on the part of the council in Carthage would only have led to the revolt of the troops. The party of the Barcas carried the question against the government, and confirmed the power of the young general. Adored by the soldiers, who saw in him their own pupil, Hannibal exercised over them an absolute authority, and believed that with their old band he could venture upon anything.
The Saguntines were at war with the Turbuletæ,[511] allies or subjects of Carthage. In contempt of the treaty of 256, Hannibal laid siege to Saguntum, and took it after a siege of several months. He pretended that, in attacking his own allies, the Saguntines had been the aggressors. The people of Saguntum hastened to implore the succour of Rome. The Senate confined itself to despatching commissioners, some to Hannibal, who gave them no attention, and others to Carthage, where they arrived only when Saguntum had ceased to exist. An immense booty, sent by the conqueror, had silenced the faction opposed to the Barcas, and the people, as well as the soldiers, elevated by success, breathed nothing but war. The Roman ambassadors, sent to require indemnities, and even to demand the head of Hannibal, were ill received, and returned declaring hostilities unavoidable.
Rome prepared for war with her usual firmness and energy. One of the consuls was ordered to pass into Sicily, and thence into Africa; the other to lead an army by sea to Spain, and expel the Carthaginians from that country. But, without waiting the issue of negotiations, Hannibal was in full march to transfer the war into Italy. Sometimes treating with the Celtiberian or Gaulish hordes to obtain a passage through their territory, sometimes intimidating them by his arms, he had reached the banks of the Rhone, when the consul charged with the conquest of Spain, P. Cornelius Scipio, landing at the eastern mouth of that river, learnt that Hannibal had already entered the Alps. He then leaves his army to his brother Cneius, returns promptly to Pisa, places himself at the head of the troops destined to fight the Boii, crosses the Po with them, hoping by this rapid movement to surprise the Carthaginian general at the moment when, fatigued and weakened, he entered the plains of Italy.
The two armies met on the banks of the Tessino (536). Scipio, defeated and wounded, fell back on the colony of Placentia. Rejoined in the neighbourhood of that town by his colleague Tib. Sempronius Longus, he again, on the Trebia, offered battle to the Carthaginians. A brilliant victory placed Hannibal in possession of a great part of Liguria and Cisalpine Gaul, the warlike hordes of which received him with enthusiasm and reinforced his army, reduced, after the passage of the mountains, to less than 30,000 men. Flattered by the reception of the Gauls, the Carthaginian general tried also to gain the Italiots, and, announcing himself as the liberator of oppressed peoples, he took care, after the victory, to set at liberty all the prisoners taken from the allies. He hoped that these liberated captives would become for him useful emissaries. In the spring of 537 he entered Etruria, crossed the marshes of the Val di Chiana, and, drawing the Roman army to the neighbourhood of the Lake Trasimenus, into an unfavourable locality, destroyed it almost totally.
The terror was great at Rome; yet the conqueror, after devastating Etruria, and attacking Spoletum in vain, crossed the Apennines, threw himself into Umbria and Picenum, and thence directed his march through Samnium towards the coast of Apulia. In fact, having reached the centre of Italy, deprived of all communication with the mother country, without the engines necessary for a siege, with no assured line of retreat, having behind him the army of Sempronius, what must Hannibal do?—Place the Apennines between himself and Rome, draw nearer to the populations more disposed in his favour, and then, by the conquest of the southern provinces, establish a solid basis of operation, in direct communication with Carthage. In spite of the victory of Trasimenus, his position was critical, for, except the Cisalpine Gauls, all the Italiot peoples remained faithful to Rome, and so far no one had come to increase his army.[512] Thus Hannibal remained several months between Casilinum and Arpi, where Fabius, by his skilful movements, would have succeeded in starving the Carthaginian army, if the term of his command had not expired. Moreover, the popular party, irritated at a system of temporising which it accused of cowardice, raised to the consulship, as the colleague of Æmilius Paulus, Varro, a man of no capacity. Obliged to remain in Apulia, to procure subsistence for his troops, Hannibal, being attacked imprudently, entirely defeated, near Cannæ, two consular armies composed of eight legions and of an equal number of allies, amounting to 87,000 men (538).[513] One of the consuls perished, the other escaped, followed only by a few horsemen. 40,000 Romans had been killed or taken, and Hannibal sent to Carthage a bushel of gold rings taken from the fingers of knights who lay on the field of battle.[514] From that moment part of Samnium, Apulia, Lucania, and Bruttium declared for the Carthaginians, while the Greek towns of the south of the peninsula remained favourable to the Romans.[515] About the same time, as an increase of ill fortune, L. Postumus, sent against the Gauls, was defeated, and his army cut to pieces.
The Romans always showed themselves admirable in adversity; and thus the Senate, by a skilful policy, went to meet the consul Varro, and thank him for not having despaired of the Republic; it would, however, no longer employ the troops which had retreated from the battle, but sent them into Sicily with a prohibition to return into Italy until the enemy had been driven out of it. They refused to ransom the prisoners in Hannibal’s hands. The fatherland, they said, had no need of men who allowed themselves to be taken arms in hand.[516] This reply made people report at Rome that the man who possessed power was treated very differently from the humble citizen.[517]
The idea of asking for peace presented itself to nobody. Each rivalled the other in sacrifices and devotion. New legions were raised, and there were enrolled 8,000 slaves, who were restored to freedom after the first combat.[518] The treasury being empty, all the private fortunes were brought to its aid. The proprietors of slaves taken for the army, the farmers of the revenue charged with the furnishing of provisions, consented to be repaid only at the end of the war. Everybody, according to his means, maintained at his own expense freedmen to serve on the galleys. After the example of the Senate, widows and minors carried their gold and silver to the public treasury. It was forbidden for anybody to keep at home either jewels, plate, silver or copper money, above a certain value, and, by the law Oppia, even the toilette of the ladies was limited.[519] Lastly, the duration of family mourning for relatives slain before the enemy was restricted to thirty days.[520]
After the victory of Cannæ it would have been more easy for Hannibal to march straight upon Rome than after Trasimenus; yet, since so great a captain did not think this possible to attempt, it is not uninteresting to inquire into his motives. In the first place, his principal force was in Numidian cavalry, which would have been useless in a siege;[521] then, he had generally the inferiority in attacking fortresses. Thus, after Trebia, he could not reduce Placentia;[522] after Trasimenus, he failed before Spoletum; three times he marched upon Naples, without venturing to attack it; later still, he was obliged to abandon the sieges of Nola, Cumæ, and Casilinum.[523] What, then, could be more natural than his hesitation to attack Rome, defended by a numerous population, accustomed to the use of arms?
The most striking proof of the genius of Hannibal is the fact of his having remained sixteen years in Italy, left almost to his own forces, reduced to the necessity of recruiting his army solely among his new allies, and of subsisting at their expense, ill seconded by the Senate of his own country, having always to face at least two consular armies, and, lastly, shut up in the peninsula by the Roman fleets, which guarded its coasts to intercept reinforcements from Carthage. His constant thought, therefore, was to make himself master of some important points of the coast in order to open a communication with Africa. After Cannæ, he occupies Capua, seeks to gain the sea by Naples,[524] Cumæ, Puteoli; unable to effect these objects, he seizes upon Arpi and Salapia, on the eastern coast, where he hopes to meet the ambassadors of the King of Macedonia. He next makes Bruttium his base of operation, and his attempts are directed against the maritime places, now against Brundusium and Tarentum, now against Locri and Rhegium.
All the defeats sustained by the generals of the Republic had been caused, first, by the superiority of the Numidian cavalry, and the inferiority of the hastily levied Latin soldiers,[525] opposed to old veteran troops; and, next, by excessive rashness in face of an able captain, who drew his adversaries to the position which he had chosen. Nevertheless, Hannibal, considerably weakened by his victories, exclaimed, after Cannæ, as Pyrrhus had done after Heraclea, that such another success would be his ruin.[526] Q. Fabius Maximus, recalled to power (539), continued a system of methodical war; while Marcellus, his colleague, bolder,[527] assumed the offensive, and arrested the progress of the enemy, by obliging him to shut himself up in a trapezium, formed on the north by Capua and Arpi, on the south by Rhegium and Tarentum. In 543 the war was entirely concentrated round two places; the citadel of Tarentum, blockaded by the Carthaginians, and Capua, besieged by the two consuls. These had surrounded themselves with lines of countervallation against the place, and of circumvallation against the attacks from without. Hannibal, having failed in his attempt to force these latter, marched upon Rome, in the hope of causing the siege of Capua to be raised, and by separating the two consular armies, defeating them one after the other in the plain country. Having arrived under the walls of the capital, and foreseeing too many difficulties in the way of making himself master of so large a town, he abandoned his plan of attack, and fell back to the environs of Rhegium. His abode there was prolonged during several years, with alternations of reverse and success, in the south of Italy, the populations of which were favourable to him; avoiding engagements, keeping near the sea, and not going beyond the southern extremity of the territory of Samnium.