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
First Sullan Restoration - Death of Sulpicius - Flight of Marius
The first military intervention in civil feuds had made it quite evident, not only that the political struggles had reached the point at which nothing save open and direct force proves decisive, but also that the power of the bludgeon was of no avail against the power of the sword. It was the conservative party which first drew the sword, and which accordingly in due time experienced the truth of the ominous words of the Gospel as to those who first have recourse to it. For the present it triumphed completely and might put the victory into formal shape at its pleasure. As a matter of course, the Sulpician laws were characterized as legally null.
Their author and his most notable adherents had fled; they were, twelve in number, proscribed by the senate for arrest and execution as enemies of their country. Publius Sulpicius was accordingly seized at Laurentum and put to death; and the head of the tribune, sent to Sulla, was by his orders exposed in the Forum at the very rostra where he himself had stood but a few days before in the full vigour of youth and eloquence. The rest of the proscribed were pursued; the assassins were on the track of even the old Gaius Marius. Although the general might have clouded the memory of his glorious days by a succession of pitiful proceedings, now that the deliverer of his country was running for his life, he was once more the victor of Vercellae, and with breathless suspense all Italy listened to the incidents of his marvellous flight.
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Reference address : https://www.ellopos.net/elpenor/rome/4-07-sulpician-revolution.asp?pg=70