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
Vain Negotiations for Peace
The spirit of the Carthaginians was broken: they sued for peace. But the conditions which the consul proposed--not merely the cession of Sicily and Sardinia, but the conclusion of an alliance on unequal terms with Rome, which would have bound the Carthaginians to renounce a war-marine of their own and to furnish vessels for the Roman wars --conditions which would have placed Carthage on a level with Neapolis and Tarentum, could not be accepted, so long as a Carthaginian army kept the field and a Carthaginian fleet kept the sea, and the capital stood unshaken.
Preparations of Carthage
The mighty enthusiasm, which is wont to blaze up nobly among Oriental nations, even the most abased, on the approach of extreme peril--the energy of dire necessity--impelled the Carthaginians to exertions, such as were by no means expected from a nation of shopkeepers. Hamilcar, who had carried on the guerilla war against the Romans in Sicily with so much success, appeared in Libya with the flower of the Sicilian troops, which furnished an admirable nucleus for the newly-levied force.
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Reference address : https://www.ellopos.net/elpenor/rome/3-02-war-rome-carthage-sicily.asp?pg=32