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
New Difficulties - Sulla Proceeds to Asia
But Mithradates rejected the peace and demanded at least that the Romans should not insist on the surrender of the war-vessels and should concede to him Paphlagonia; while he at the same time asserted that Fimbria was ready to grant him far more favourable conditions. Sulla, offended by this placing of his offers on an equal footing with those of an unofficial adventurer, and having already gone to the utmost measure of concession, broke off the negotiations.
He had employed the interval to reorganize Macedonia and to chastise the Dardani, Sinti, and Maedi, in doing which he at once procured booty for his army and drew nearer Asia; for he was resolved at any rate to go thither, in order to come to a reckoning with Fimbria. He now at once put his legions stationed in Thrace as well as his fleet in motion towards the Hellespont. Then at length Archelaus succeeded in wringing from his obstinate master a reluctant consent to the treaty; for which he was subsequently regarded with an evil eye at court as the author of the injurious peace, and even accused of treason, so that some time afterwards he found himself compelled to leave the country and to take refuge with the Romans, who readily received him and loaded him with honours.
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Reference address : https://www.ellopos.net/elpenor/rome/4-08-east-king-mithradates.asp?pg=66