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
But even in this point of view his proceedings can only be understood, when we recollect that Mithradates had become acquainted by twenty years' experience with the Roman policy of that day. He knew very well that the Roman government were far from desirous of war; that they in fact, looking to the serious danger which threatened their rule from any general of reputation, and with the fresh remembrance of the Cimbrian war and Marius, dreaded war still more if possible than he did himself. He acted accordingly.
He was not afraid to demean himself in a way which would have given to any energetic government not fettered by selfish considerations manifold ground and occasion for declaring war; but he carefully avoided any open rupture which would have placed the senate under the necessity of declaring it. As soon as men appeared to be in earnest he drew back, before Sulla as well as before Aquillius; he hoped, doubtless, that he would not always be confronted by energetic generals, that he too would, as well as Jugurtha, fall in with his Scaurus or Albinus.
It must be owned that this hope was not without reason; although the very example of Jugurtha had on the other hand shown how foolish it was to confound the bribery of a Roman commander and the corruption of a Roman army with the conquest of the Roman people.
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Reference address : https://www.ellopos.net/elpenor/rome/4-08-east-king-mithradates.asp?pg=34