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
State of Sicily
For upwards of a century the feud between the Carthaginians and the rulers of Syracuse had devastated the fair island of Sicily. On both sides the contest was carried on with the weapons of political proselytism, for, while Carthage kept up communications with the aristocratic-republican opposition in Syracuse, the Syracusan dynasts maintained relations with the national party in the Greek cities that had become tributary to Carthage.
On both sides armies of mercenaries were employed to fight their battles--by Timoleon and Agathocles, as well as by the Phoenician generals. And as like means were employed on both sides, so the conflict had been waged on both with a disregard of honour and a perfidy unexampled in the history of the west. The Syracusans were the weaker party. In the peace of 440 Carthage had still limited her claims to the third of the island to the west of Heraclea Minoa and Himera, and had expressly recognized the hegemony of the Syracusans over all the cities to the eastward.
The expulsion of Pyrrhus from Sicily and Italy (479) left by far the larger half of the island, and especially the important Agrigentum, in the hands of Carthage; the Syracusans retained nothing but Tauromenium and the south-east of the island.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/3-02-war-rome-carthage-sicily.asp