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
Complete Submission of the Volscian and Campanian Provinces
In like manner the dominion of Rome was established and confirmed in the south Volscian and Campanian territories. Fundi, Formiae, Capua, Cumae, and a number of smaller towns became dependent Roman communities with self-administration. To secure the pre-eminently important city of Capua, the breach between the nobility and commons was artfully widened, the communal constitution was revised in the Roman interest, and the administration of the town was controlled by Roman officials annually sent to Campania.
The same treatment was measured out some years after to the Volscian Privernum, whose citizens, supported by Vitruvius Vaccus a bold partisan belonging to Fundi, had the honour of fighting the last battle for the freedom of this region; the struggle ended with the storming of the town (425) and the execution of Vaccus in a Roman prison. In order to rear a population devoted to Rome in these regions, they distributed, out of the lands won in war particularly in the Privernate and Falernian territories, so numerous allotments to Roman burgesses, that a few years later (436) they were able to institute there also two new tribes.
The establishment of two fortresses as colonies with Latin rights finally secured the newly won land. These were Cales (420) in the middle of the Campanian plain, whence the movements of Teanum and Capua could be observed, and Fregellae (426), which commanded the passage of the Liris. Both colonies were unusually strong, and rapidly became flourishing, notwithstanding the obstacles which the Sidicines interposed to the founding of Cales and the Samnites to that of Fregellae.
A Roman garrison was also despatched to Sora, a step of which the Samnites, to whom this district had been left by the treaty, complained with reason, but in vain. Rome pursued her purpose with undeviating steadfastness, and displayed her energetic and far-reaching policy--more even than on the battlefield--in the securing of the territory which she gained by enveloping it, politically and militarily, in a net whose meshes could not be broken.
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Reference address : https://www.ellopos.net/elpenor/rome/2-05-subjugation-latins-campanians.asp?pg=34