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
That it was not regard either for the Carthaginian peace party or for existing treaties which withheld the Romans from action, is self-evident; moreover, if they desired war, the Spanish feuds furnished at any moment a ready pretext. The conduct of Rome in this view is by no means unintelligible; but as little can it be denied that the Roman senate in dealing with this matter displayed shortsightedness and slackness--faults which were still more inexcusably manifested in their mode of dealing at the same epoch with Gallic affairs.
The policy of the Romans was always more remarkable for tenacity, cunning, and consistency, than for grandeur of conception or power of rapid organization--qualities in which the enemies of Rome from Pyrrhus down to Mithradates often surpassed her.
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Reference address : https://www.ellopos.net/elpenor/rome/3-04-hamilcar-hannibal.asp?pg=20