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
Attitude of Crassus and Caesar toward the Anarchists
The anarchist plot had thus been suppressed in the capital as in Italy with bloody violence; people were still reminded of it merely by the criminal processes which in the Etruscan country towns and in the capital thinned the ranks of those affiliated to the beaten party, and by the large accessions to the robber-bands of Italy-- one of which, for instance, formed out of the remains of the armies of Spartacus and Catilina, was destroyed by a military force in 694 in the territory of Thurii. But it is important to keep in view that the blow fell by no means merely on the anarchists proper, who had conspired to set the capital on fire and had fought at Pistoria, but on the whole democratic party.
That this party, and in particular Crassus and Caesar, had a hand in the game on the present occasion as well as in the plot of 688, may be regarded--not in a juristic, but in a historical, point of view-- as an ascertained fact. The circumstance, indeed, that Catulus and the other heads of the senatorial party accused the leader of the democrats of complicity in the anarchist plot, and that the latter as senator spoke and voted against the brutal judicial murder contemplated by the oligarchy, could only be urged by partisan sophistry as any valid proof of his participation in the plans of Catilina. But a series of other facts is of more weight. According to express and irrefragable testimonies it was especially Crassus and Caesar that supported the candidature of Catilina for the consulship.
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Reference address : https://www.ellopos.net/elpenor/rome/5-05-parties-pompeius.asp?pg=42