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
But this was a poor compensation for the now inevitable fall of Capua. Long had its citizens, particularly the better passes, anticipated with sorrowful forebodings what was coming; the senate-house and the administration of the city were left almost exclusively to the leaders of the popular party hostile to Rome. Now despair seized high and low, Campanians and Phoenicians alike. Twenty-eight senators chose a voluntary death; the remainder gave over the city to the discretion of an implacably exasperated foe.
Of course a bloody retribution had to follow; the only discussion was as to whether the process should be long or short: whether the wiser and more appropriate course was to probe to the bottom the further ramifications of the treason even beyond Capua, or to terminate the matter by rapid executions. Appius Claudius and the Roman senate wished to take the former course; the latter view, perhaps the less inhuman, prevailed.
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=60