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
Guerilla War in Sicily - Agrigentum Occupied by the Romans - Sicily Tranquillized
Sicily thus appeared lost to the Carthaginians; but the genius of Hannibal exercised even from a distance its influence there. He despatched to the Carthaginian army, which remained at. Agrigentum in perplexity and inaction under Hanno and Epicydes, a Libyan cavalry officer Muttines, who took the command of the Numidian cavalry, and with his flying squadrons, fanning into an open flame the bitter hatred which the despotic rule of the Romans had excited over all the island, commenced a guerilla warfare on the most extensive scale and with the happiest results; so that he even, when the Carthaginian and Roman armies met on the river Himera, sustained some conflicts with Marcellus himself successfully.
The relations, however, which prevailed between Hannibal and the Carthaginian council, were here repeated on a small scale. The general appointed by the council pursued with jealous envy the officer sent by Hannibal, and insisted upon giving battle to the proconsul without Muttines and the Numidians. The wish of Hanno was carried out, and he was completely beaten. Muttines was not induced to deviate from his course; he maintained himself in the interior of the country, occupied several small towns, and was enabled by the not inconsiderable reinforcements which joined him from Carthage gradually to extend his operations.
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=20