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
It was the first attempt to accomplish their Romanization not by extirpating the old inhabitants and filling their places with Italian emigrants, but by Romanizing the provincials themselves. The Optimates in Rome sneered at the wretched emigrant, the runaway from the Italian army, the last of the robber-band of Carbo; the sorry taunt recoiled upon its authors. The masses that had been brought into the field against Sertorius were reckoned, including the Spanish general levy, at 120,000 infantry, 2000 archers and slingers, and 6000 cavalry. Against this enormous superiority of force Sertorius had not only held his ground in a series of successful conflicts and victories, but had also reduced the greater part of Spain under his power.
In the Further province Metellus found himself confined to the districts immediately occupied by his troops; hereall the tribes, who could, had taken the side of Sertorius. In the Hither province, after the victories of Hirtuleius, there no longer existed a Roman army. Emissaries of Sertorius roamed through the whole territory of Gaul; there, too, the tribes began to stir, and bands gathering together began to make the Alpine passes insecure. Lastly the sea too belonged quite as much to the insurgents as to the legitimate government, since the allies of the former--the pirates--were almost as powerful in the Spanish waters as the Roman ships of war. At the promontory of Diana (now Denia, between Valencia and Alicante) Sertorius established for the corsairs a fixed station, where they partly lay in wait for such Roman ships as were conveying supplies to the Roman maritime towns and the army, partly carried away or delivered goods for the insurgents, and partly formed their medium of intercourse with Italy and Asia Minor. The constant readiness of these men moving to and fro to carry everywhere sparks from the scene of conflagration tended in a high degree to excite apprehension, especially at a time when so much combustible matter was everywhere accumulated in the Roman empire.
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Reference address : https://www.ellopos.net/elpenor/rome/5-01-lepidus-sertorius.asp?pg=30