Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
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.
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=59