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 New Relations of the Romans in the East
The work begun by Lucullus had been completed by Pompeius; the hitherto formally independent states of Bithynia, Pontus, and Syria were united with the Roman state; the exchange--which had been recognized for more than a hundred years as necessary-- of the feeble system of a protectorate for that of direct sovereignty over the more important dependent territories,(17) had at length been realized, as soon as the senate had been overthrown and the Gracchan party had come to the helm.
17. Cf. III. IV. War Party and Peace Party in Carthage
Rome had obtained in the east new frontiers, new neighbours, new friendly and hostile relations. There were now added to the indirect territories of Rome the kingdom of Armenia and the principalities of the Caucasus, and also the kingdom on the Cimmerian Bosporus, the small remnant of the extensive conquests of Mithradates Eupator, now a client-state of Rome under the government of his son and murderer Pharnaces; the town of Phanagoria alone, whose commandant Castor had given the signal for the revolt, was on that account recognized by the Romans as free and independent.
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Reference address : https://www.ellopos.net/elpenor/rome/5-04-pompeius-east.asp?pg=44