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
The patriotic party had the ascendency among the citizens; it was resolved to allow the opposition to negotiate for peace, and meanwhile to prepare for a last and decisive effort. Orders were sent to Mago and Hannibal to return with all speed to Africa. Mago, who for three years (549-551) had been labouring to bring about a coalition in Northern Italy against Rome, had just at this time in the territory of the Insubres (about Milan) been defeated by the far superior double army of the Romans.
The Roman cavalry had been brought to give way, and the infantry had been thrown into confusion; victory seemed on the point of declaring for the Carthaginians, when a bold attack by a Roman troop on the enemy's elephants, and above all a serious wound received by their beloved and able commander, turned the fortune of the battle. The Phoenician army was obliged to retreat to the Ligurian coast, where it received and obeyed the order to embark; but Mago died of his wound on the voyage.
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=86