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
Fifty-three of the officers and magistrates of Capua were scourged and beheaded in the marketplaces of Cales and Teanum by the orders and before the eyes of the proconsul Quintus Flaccus, the rest of the senators were imprisoned, numbers of the citizens were sold into slavery, and the estates of the more wealthy were confiscated. Similar penalties were inflicted upon Atella and Caiatia.
These punishments were severe; but, when regard is had to the importance of the revolt of Capua from Rome, and to what was the ordinary if not warrantable usage of war in those times, they were not unnatural. And had not the citizens themselves pronounced their own sentence, when immediately after their defection they put to death all the Roman citizens present in Capua at the time of the revolt?
But it was unjustifiable in Rome to embrace this opportunity of gratifying the secret rivalry that had long subsisted between the two largest cities of Italy, and of wholly annihilating, in a political point of view, her hated and envied competitor by abolishing the constitution of the Campanian city.
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=61