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
Thereupon Sulla himself, leaving behind a corps against Carbo, returned to Latium and took up a well-chosen position in the defiles in front of Praeneste, where he barred the route of the relieving army.(15)
15. It is stated, that Sulla occupied the defile by which alone Praeneste was accessible (App. i. 90); and the further events showed that the road to Rome was open to him as well as to the relieving army. Beyond doubt Sulla posted himself on the cross road which turns off from the Via Latina, along which the Samnites advanced, at Valmontone towards Palestrina; in this case Sulla communicated with the capital by the Praenestine, and the enemy by the Latin or Labican, road.
In vain the garrison attempted to break through the lines of Ofella, in vain the relieving army attempted to dislodge Sulla; both remained immoveable in their strong positions, even after Damasippus, sent by Carbo, had reinforced the relieving army with two legions.
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Reference address : https://www.ellopos.net/elpenor/rome/4-09-cinna-sulla.asp?pg=46