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
Reaction in Asia Minor against Mithradates
Meanwhile the circumstances of Asia Minor also had undergone a material change. If king Mithradates had once come forward as the liberator of the Greeks, if he had introduced his rule with the recognition of civic independence and with remission of taxes, they had after this brief ecstasy been but too rapidly and too bitterly undeceived. He had very soon emerged in his true character, and had begun to exercise a despotism far surpassing the tyranny of the Roman governors--a despotism which drove even the patient inhabitants of Asia Minor to open revolt.
The sultan again resorted to the most violent expedients. His decrees granted independence to the townships which turned to him, citizenship to the -metoeci-, full remission of debts to the debtors, lands to those that had none, freedom to the slaves; nearly 15,000 such manumitted slaves fought in the army of Archelaus. The most fearful scenes were the result of this high-handed subversion of all existing order. The most considerable mercantile cities, Smyrna, Colophon, Ephesus, Tralles, Sardes, closed their gates against the king's governors or put them to death, and declared for Rome.(16)
16. The resolution of the citizens of Ephesus to this effect has recently been found (Waddington, Additions to Lebas, Inscr. iii. 136 a). They had, according to their own declaration, fallen into the power of Mithradates "the king of Cappadocia," being frightened by the magnitude of his forces and the suddenness of his attack; but, when opportunity offered, they declared war against him "for the rule (ἡγεμονία) of the Romans and the common weal."
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Reference address : https://www.ellopos.net/elpenor/rome/4-08-east-king-mithradates.asp?pg=60