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
After each victory Mithradates had dismissed all the prisoners belonging to the militia of Asia Minor, and had neglected no step to raise to a higher pitch the national sympathies that were from the first turned towards him. Now the whole country as far as the Maeander was with the exception of a few fortresses in his power; and news at the same time arrived, that a new revolution had broken out at Rome, that the consul Sulla destined to act against Mithradates had instead of embarking for Asia marched on Rome, that the most celebrated Roman generals were fighting battles with each other in order to settle to whom the chief command in the Asiatic war should belong.
Rome seemed zealously employed in the work of self-destruction: it is no wonder that, though even now minorities everywhere adhered to Rome, the great body of the natives of Asia Minor joined the Pontic king. Greeks and Asiatics united in the rejoicing which welcomed the deliverer; it became usual to compliment the king, in whom as in the divine conqueror of the Indians Asia and Greece once more found a common meeting-point, under the name of the new Dionysus.
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Reference address : https://www.ellopos.net/elpenor/rome/4-08-east-king-mithradates.asp?pg=41