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
Hamilcar Proceed to Spain - Spanish Kingdom of the Barcides
The new commander-in-chief of Libya departed from Carthage immediately after the termination of the mercenary war (perhaps in the spring of 518). He apparently meditated an expedition against the free Libyans in the west. His army, which was especially strong in elephants, marched along the coast; by its side sailed the fleet, led by his faithful associate Hasdrubal.
Suddenly tidings came that he had crossed the sea at the Pillars of Hercules and had landed in Spain, where he was waging war with the natives--with people who had done him no harm, and without orders from his government, as the Carthaginian authorities complained. They could not complain at any rate that he neglected the affairs of Africa; when the Numidians once more rebelled, his lieutenant Hasdrubal so effectually routed them that for a long period there was tranquillity on the frontier, and several tribes hitherto independent submitted to pay tribute.
What he personally did in Spain, we are no longer able to trace in detail. His achievements compelled Cato the elder, who, a generation after Hamilcar's death, beheld in Spain the still fresh traces of his working, to exclaim, notwithstanding all his hatred of the Carthaginians, that no king was worthy to be named by the side of Hamilcar Barcas.
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Reference address : https://www.ellopos.net/elpenor/rome/3-04-hamilcar-hannibal.asp?pg=13