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
Sulla may moreover be justly blamed that, while in all important matters he acted with remorseless vigour, in subordinate and more especially in personal questions he very frequently yielded to his sanguine temperament and dealt according to his likings or dislikings. Wherever he really felt hatred, as for instance against the Marians, he allowed it to take its course without restraint even against the innocent, and boasted of himself that no one had better requited friends and foes.(52)
52. Euripides, Medea, 807: μηδείς με φαύλην κἀσθενῆ νομιζέτω μηδ΄ ἡσυχαίαν ἀλλὰ θατέρου τρόπου͵ βαρεῖαν ἐχθροῖς καὶ φίλοισιν εὐμενῆ.
He did not disdain on occasion of his plenitude of power to accumulate a colossal fortune. The first absolute monarch of the Roman state, he verified the maxim of absolutism--that the laws do not bind the prince--forthwith in the case of those laws which he himself issued as to adultery and extravagance. But his lenity towards his own party and his own circle was more pernicious for the state than his indulgence towards himself. The laxity of his military discipline, although it was partly enjoined by his political exigencies, may be reckoned as coming under this category; but far more pernicious was his indulgence towards his political adherents.
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Reference address : https://www.ellopos.net/elpenor/rome/4-10-sullan-constitution.asp?pg=73