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
Development of Italy
The general result of this system is only too clearly obvious in the changed proportions of the population. It is true that the condition of the various districts of Italy was very unequal, and some were even prosperous. The farms, instituted in great numbers in the region between the Apennines and the Po at the time of its colonization, did not so speedily disappear. Polybius, who visited that quarter not long after the close of the present period, commends its numerous, handsome, and vigorous population: with a just legislation as to corn it would doubtless have been possible to make the basin of the Po, and not Sicily the granary of the capital. In like manner Picenum and the so-called -ager Gallicus- acquired a numerous body of farmers through the distributions of domain-land consequent on the Flaminian law of 522--a body, however, which was sadly reduced in the Hannibalic war.
In Etruria, and perhaps also in Umbria, the internal condition of the subject communities was unfavourable to the flourishing of a class of free farmers, Matters were better in Latium--which could not be entirely deprived of the advantages of the market of the capital, and which had on the whole been spared by the Hannibalic war--as well as in the secluded mountain-valleys of the Marsians and Sabellians. On the other hand the Hannibalic war had fearfully devastated southern Italy and had ruined, in addition to a number of smaller townships, its two largest cities, Capua and Tarentum, both once able to send into the field armies of 30,000 men.
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Reference address : https://www.ellopos.net/elpenor/rome/3-12-management-land-capital.asp?pg=46