Hannibal tried a further expedient, the last which occurred to his inventive genius, to save the important city. After giving the Campanians information of his intention and exhorting them to hold out, he started with the relieving army from Capua and took the road for Rome. With the same dexterous boldness which he had shown in his first Italian campaigns, he threw himself with a weak army between the armies and fortresses of the enemy, and led his troops through Samnium and along the Valerian Way past Tibur to the bridge over the Anio, which he passed and encamped on the opposite bank, five miles from the city. The children's children of the Romans still shuddered, when they were told of "Hannibal at the gate"; real danger there was none. The country houses and fields in the neighbourhood of the city were laid waste by the enemy; the two legions in the city, who went forth against them, prevented the investment of the walls. Besides, Hannibal had never expected to surprise Rome by a -coup de main-, such as Scipio soon afterwards executed against New Carthage, and still less had he meditated a siege in earnest; his only hope was that in the first alarm part of the besieging army of Capua would march to Rome and thus give him an opportunity of breaking up the blockade. Accordingly after a brief stay he departed. The Romans saw in his withdrawal a miraculous intervention of the gods, who by portents and visions had compelled the wicked man to depart, when in truth the Roman legions were unable to compel him; at the spot where Hannibal had approached nearest to the city, at the second milestone on the Appian Way in front of the Capene gate, with grateful credulity the Romans erected an altar to the god "who turned back and protected" (-Rediculus Tutanus-), Hannibal in reality retreated, because this was part of his plan, and directed his march towards Capua. But the Roman generals had not committed the mistake on which their opponent had reckoned; the legions remained unmoved in the lines round Capua, and only a weak corps had been detached on the news of Hannibal's march towards Rome. When Hannibal learned this, he suddenly turned against the consul Publius Galba, who had imprudently followed him from Rome, and with whom he had hitherto avoided an engagement, vanquished him, and took his camp by storm. Capua Capitulates