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
Successes of Pompeius in the East
With high-strung hopes men saw the two generals Pompeius and Glabrio depart for their places of destination. The price of grain had fallen immediately after the passing of the Gabinian laws to the ordinary rates--an evidence of the hopes attached to the grand expedition and its glorious leader. These hopes were, as we shall have afterwards to relate, not merely fulfilled, but surpassed: in three months the clearing of the seas was completed.
Since the Hannibalic war the Roman government had displayed no such energy in external action; as compared with the lax and incapable administration of the oligarchy, the democratic-- military opposition had most brilliantly made good its title to grasp and wield the reins of the state. The equally unpatriotic and unskilful attempts of the consul Piso to put paltry obstacles in the way of the arrangements of Pompeius for the suppression of piracy in Narbonese Gaul only increased the exasperation of the burgesses against the oligarchy and their enthusiasm for Pompeius; it was nothing but the personal intervention of the latter, that prevented the assembly of the people from summarily removing the consul from his office.
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Reference address : https://www.ellopos.net/elpenor/rome/5-03-fall-oligarchy-pompeius.asp?pg=34