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 total destruction of the regular troops and free bands in Lucania led by Marcus Centenius, a man imprudently promoted from a subaltern to be a general, and the not much less complete defeat of the negligent and arrogant praetor Gnaeus Fulvius Flaccus in Apulia, closed the long series of the misfortunes of this year. But the stubborn perseverance of the Romans again neutralized the rapid success of Hannibal, at least at the most decisive point. As soon as Hannibal turned his back on Capua to proceed to Apulia, the Roman armies once more gathered around that city, one at Puteoli and Volturnum under Appius Claudius, another at Casilinum under Quintus Fulvius, and a third on the Nolan road under the praetor Gaius Claudius Nero.
The three camps, well entrenched and connected with one another by fortified lines, precluded all access to the place, and the large, inadequately provisioned city could not but find itself compelled by the mere investment to surrender at no distant time, should no relief arrive. As the winter of 542-3 drew to an end, the provisions were almost exhausted, and urgent messengers, who were barely able to steal through the well-guarded Roman lines, requested speedy help from Hannibal, who was at Tarentum, occupied with the siege of the citadel.
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=56