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
With the subjugation of Italy the Roman burgess-body had closed its ranks; the bestowal of the franchise on whole communities was totally given up, its bestowal on individuals was greatly restricted.(5)
5. Cf. III. XI. Roman Franchise More Difficult of Acquisition
They now advanced a step farther: on occasion of the agitation which contemplated the extension of the Roman franchise to all Italy in the years 628, 632, the right of migration to Rome was itself attacked, and all the non-burgesses resident in Rome were directly ejected by decree of the people and of the senate from the capital(6)--a measure as odious on account of its illiberality, as dangerous from the various private interests which it injuriously affected.
6. Cf. IV. III. Democratic Agitation under Carbo and Flaccus, IV. III. Overthrow of Gracchus
In short, while the Italian allies had formerly stood to the Romans partly in the relation of brothers under tutelage, protected rather than ruled and not destined to perpetual minority, partly in that of slaves tolerably treated and not utterly deprived of the hope of manumission, they were now all of them subject nearly in equal degree, and with equal hopelessness, to the rods and axes of their Roman masters, and might at the utmost presume like privileged slaves to transmit the kicks received from their masters onward to the poor provincials.
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Reference address : https://www.ellopos.net/elpenor/rome/4-07-sulpician-revolution.asp?pg=6