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
Extension and Civilization of Numidia
We have already narrated how purposely and clearly the Romans in their management of African affairs evinced their taking part with Massinissa, and how zealously and constantly the latter availed himself of the tacit permission to enlarge his territory at the expense of Carthage. The whole interior to the border of the desert fell to the native sovereign as it were of its own accord, and even the upper valley of the Bagradas (Mejerdah) with the rich town of Vaga became subject to the king; on the coast also to the east of Carthage he occupied the old Sidonian city of Great Leptis and other districts, so that his kingdom stretched from the Mauretanian to the Cyrenaean frontier, enclosed the Carthaginian territory on every side by land, and everywhere pressed, in the closest vicinity, on the Phoenicians.
It admits of no doubt, that he looked on Carthage as his future capital; the Libyan party there was significant. But it was not only by the diminution of her territory that Carthage suffered injury. The roving shepherds were converted by their great king into another people. After the example of the king, who brought the fields under cultivation far and wide and bequeathed to each of his sons considerable landed estates, his subjects also began to settle and to practise agriculture. As he converted his shepherds into settled citizens, he converted also his hordes of plunderers into soldiers who were deemed by Rome worthy to fight side by side with her legions; and he bequeathed to his successors a richly-filled treasury, a well- disciplined army, and even a fleet.
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Reference address : https://www.ellopos.net/elpenor/rome/3-07-peace-hannibal-third-period.asp?pg=23