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
If Carthaginian statesmen believed that they had attached to the interests of Carthage her Phoenician subjects by their greater dread of a Libyan revolt and all the landholders by means of token-money, they transferred mercantile calculation to a sphere to which it did not apply. Experience proved that the Roman symmachy, notwithstanding its seemingly looser bond of connection, kept together against Pyrrhus like a wall of rock, whereas the Carthaginian fell to pieces like a gossamer web as soon as a hostile army set foot on African soil.
It was so on the landing of Agathocles and of Regulus, and likewise in the mercenary war; the spirit that prevailed in Africa is illustrated by the fact, that the Libyan women voluntarily contributed their ornaments to the mercenaries for their war against Carthage. In Sicily alone the Carthaginians appear to have exercised a milder rule, and to have attained on that account better results. They granted to their subjects in that quarter comparative freedom in foreign trade, and allowed them to conduct their internal commerce, probably from the outset and exclusively, with a metallic currency; far greater freedom of movement generally was allowed to them than was permitted to the Sardinians and Libyans.
Had Syracuse fallen into Carthaginian hands, their policy would doubtless soon have changed. But that result did not take place; and so, owing to the well-calculated mildness of the Carthaginian government and the unhappy distractions of the Sicilian Greeks, there actually existed in Sicily a party really friendly to the Phoenicians; for example, even after the island had passed to the Romans, Philinus of Agrigentum wrote the history of the great war in a thoroughly Phoenician spirit. Nevertheless on the whole the Sicilians must, both as subjects and as Greeks, have been at least as averse to their Phoenician masters as the Samnites and Tarentines were to the Romans.
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Reference address : https://www.ellopos.net/elpenor/rome/3-01-carthage.asp?pg=40