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 war doubtless was not ended, so long as the old king was still among the living; but who could guarantee that they would really succeed in catching the royal game for the sake of which this unparalleled chase was to be instituted? Was it not better even at the risk of Mithradates once more throwing the torch of war into Asia Minor, to desist from a pursuit which promised so little gain and so many dangers?
Doubtless numerous voices in the army, and still more numerous voices in the capital, urged the general to continue the pursuit incessantly and at any price; but they were the voices partly of foolhardy Hotspurs, partly of those perfidious friends, who would gladly at any price have kept the too-powerful Imperator aloof from the capital and entangled him amidst interminable undertakings in the east. Pompeius was too experienced and too discreet an officer to stake his fame and his army in obstinate adherence to so injudicious an expedition; an insurrection of the Albanians in rear of the army furnished the pretext for abandoning the further pursuit of the king and arranging its return.
The fleet received instructions to cruise in the Black Sea, to protect the northern coast of Asia Minor against any hostile invasion, and strictly to blockade the Cimmerian Bosporus under the threat of death to any trader who should break the blockade. Pompeius conducted the land troops not without great hardships through the Colchian and Armenian territory to the lower course of the Kur and onward, crossing the stream, into the Albanian plain.
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Reference address : https://www.ellopos.net/elpenor/rome/5-04-pompeius-east.asp?pg=21