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 representations which Pompeius addressed to Rome, and which derived emphasis from the behaviour of Mithradates in the east, were successful. He had the necessary supplies of money sent to him by the senate and was reinforced by two fresh legions. Thus the two generals went to work again in the spring of 680 and once more crossed the Ebro. Eastern Spain was wrested from the Sertorians in consequence of the battles on the Xucar and Guadalaviar; the struggle thenceforth became concentrated on the upper and middle Ebro around the chief strongholds of the Sertorians--Calagurris, Osca, Ilerda. As Metellus had done best in the earlier campaigns, so too on this occasion he gained the most important successes.
His old opponent Hirtuleius, who again confronted him, was completely defeated and fell himself along with his brother--an irreparable loss for the Sertorians. Sertorius, whom the unfortunate news reached just as he was on the point of assailing the enemy opposed to him, cut down the messenger, that the tidings might not discourage his troops; but the news could not be long concealed. One town after another surrendered, Metellus occupied the Celtiberian towns of Segobriga (between Toledo and Cuenca) and Bilbilis (near Calatayud). Pompeius besieged Pallantia (Palencia above Valladolid), but Sertorius relieved it, and compelled Pompeius to fall back upon Metellus; in front of Calagurris (Calahorra, on the upper Ebro), into which Sertorius had thrown himself, they both suffered severe losses. Nevertheless, when they went into winter-quarters--Pompeius to Gaul, Metellus to his own province--they were able to look back on considerable results; a great portion of the insurgents had submitted or had been subdued by arms.
In a similar way the campaign of the following year (681) ran its course; in this case it was especially Pompeius who slowly but steadily restricted the field of the insurrection.
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Reference address : http://www.ellopos.net/elpenor/rome/5-01-lepidus-sertorius.asp?pg=52