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 Takes the Supreme Command against Mithradates
Pompeius during these events remained in Cilicia; preparing for the next year, as it seemed, a campaign against the Cretans or rather against Metellus, in reality waiting for the signal which should call him to interfere in the utterly confused affairs of the mainland of Asia Minor. The portion of the Lucullan army that was still left after the losses which it had suffered and the departure of the Fimbrian legions remained inactive on the upper Halys in the country of the Trocmi bordering on the Pontic territory. Lucullus still held provisionally the chief command, as his nominated successor Glabrio continued to linger in the west of Asia Minor.
The three legions commanded by Quintus Marcius Rex lay equally inactive in Cilicia. The Pontic territory was again wholly in the power of king Mithradates, who made the individuals and communities that had joined the Romans, such as the town of Eupatoria, pay for their revolt with cruel severity. The kings of the east did not proceed to any serious offensive movement against the Romans, either because it formed no part of their plan, or--as was asserted-- because the landing of Pompeius in Cilicia induced Mithradates and Tigranes to desist from advancing farther.
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Reference address : https://www.ellopos.net/elpenor/rome/5-04-pompeius-east.asp?pg=6