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
Pompeius, however, forced the passage of the Ebro against Perpenna and took up a position on the river Pallantias, near Saguntum, whence, as we have already said, the Sertorians maintained their communications with Italy and the east. It was time that Sertorius should appear in person, and throw the superiority of his numbers and of his genius into the scale against the greater excellence of the soldiers of his opponent. For a considerable time the struggle was concentrated around the town of Lauro (on the Xucar, south of Valencia), which had declared for Pompeius and was on that account besieged by Sertorius.
Pompeius exerted himself to the utmost to relieve it; but, after several of his divisions had already been assailed separately and cut to pieces, the great warrior found himself--just when he thought that he had surrounded the Sertorians, and when he had already invited the besieged to be spectators of the capture of the besieging army--all of a sudden completely outmanoeuvred; and in order that he might not be himself surrounded, he had to look on from his camp at the capture and reduction to ashes of the allied town and at the carrying off of its inhabitants to Lusitania--an event which induced a number of towns that had been wavering in middle and eastern Spain to adhere anew to Sertorius.
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Reference address : https://www.ellopos.net/elpenor/rome/5-01-lepidus-sertorius.asp?pg=44