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
The coalition was more agreed regarding these questions of principle than with respect to the personal questions which such a political revolution raised. As might be expected, the democrats were not content with the general recognition of their programme; but they too now demanded a restoration in their sense--revival of the commemoration of their dead, punishment of the murderers, recall of the proscribed from exile, removal of the political disqualification that lay on their children, restoration of the estates confiscated by Sulla, indemnification at the expense of the heirs and assistants of the dictator. These were certainly the logical consequences which ensued from a pure victory of the democracy; but the victory of the coalition of 683 was very far from being such.
The democracy gave to it their name and their programme, but it was the officers who had joined the movement, and above all Pompeius, that gave to it power and completion; and these could never yield their consent to a reaction which would not only have shaken the existing state of things to its foundations, but would have ultimately turned against themselves--men still had a lively recollection who the men were whose blood Pompeius had shed, and how Crassus had laid the foundation of his enormous fortune. It was natural therefore, but at the same time significant of the weakness of the democracy, that the coalition of 683 took not the slightest step towards procuring for the democrats revenge or even rehabilitation.
The supplementary collection of all the purchase money still outstanding for confiscated estates bought by auction, or even remitted to the purchasers by Sulla-- for which the censor Lentulus provided in a special law-- can hardly be regarded as an exception; for though not a few Sullans were thereby severely affected in their personal interests, yet the measure itself was essentially a confirmation of the confiscations undertaken by Sulla.
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Reference address : https://www.ellopos.net/elpenor/rome/5-03-fall-oligarchy-pompeius.asp?pg=16