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
A peculiarly favourite method was to eject the wife
and children of the farmer from the homestead, while he was in the
field, and to bring him to compliance by means of the theory of
"accomplished fact." The landlords continued mainly to employ slaves
instead of free labourers, because the former could not like the
latter be called away to military service; and thus reduced the free
proletariate to the same level of misery with the slaves.
They
continued to supersede Italian grain in the market of the capital,
and to lessen its value over the whole peninsula, by selling Sicilian
slave-corn at a mere nominal price. In Etruria the old native
aristocracy in league with the Roman capitalists had as early as 620
brought matters to such a pass, that there was no longer a free farmer
there. It could be said aloud in the market of the capital, that the
beasts had their lairs but nothing was left to the burgesses save
the air and sunshine, and that those who were styled the masters
of the world had no longer a clod that they could call their own.