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
Rehabilitation of Saturninus and Marius
Lastly, they did not hesitate now to name once more in public the long-proscribed names of the heroes and martyrs of the democracy, and to celebrate their memory. We have already mentioned how Saturninus was rehabilitated by the process directed against his murderer. But a different sound withal had the name of Gaius Marius, at the mention of which all hearts once had throbbed; and it happened that the man, to whom Italy owed her deliverance from the northern barbarians, was at the same time the uncle of the present leader of the democracy.
Loudly had the multitude rejoiced, when in 686 Gaius Caesar ventured in spite of the prohibitions publicly to show the honoured features of the hero in the Forum at the interment of the widow of Marius. But when, three years afterwards (689), the emblems of victory, which Marius had caused to be erected in the Capitol and Sulla had ordered to be thrown down, one morning unexpectedly glittered afresh in gold and marble at the old spot, the veterans from the African and Cimbrian wars crowded, with tears in their eyes, around the statue of their beloved general; and in presence of the rejoicing masses the senate did not venture to seize the trophies which the same bold hand had renewed in defiance of the laws.
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Reference address : https://www.ellopos.net/elpenor/rome/5-05-parties-pompeius.asp?pg=11