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
The two hundred years' strife was brought at length to: a close by the
law of the dictator Q. Hortensius (465, 468) which was occasioned by a
dangerous popular insurrection, and which declared that the decrees of
the plebs should stand on an absolute footing of equality--instead of
their earlier conditional equivalence--with those of the whole
community.
So greatly had the state of things been changed that
that portion of the burgesses which had once possessed exclusively
the right of voting was thenceforth, under the usual form of taking
votes binding for the whole burgess-body, no longer so much as asked
the question.
