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
Siege of Praeneste - Occupation of Rome
The broken bands of Marius threw themselves into the neighbouring and strong cities of new burgesses Norba and Praeneste: Marius in person with the treasure and the greater part of the fugitives entered the latter. Sulla left an able officer, Quintus Ofella, before Praeneste just as he had done in the previous year before Capua, with instructions not to expend his strength in the siege of the strong town, but to enclose it with an extended line of blockade and starve it into surrender.
He himself advanced from different sides upon the capital, which as well as the whole surrounding district he found abandoned by the enemy, and occupied without resistance. He barely took time to compose the minds of the people by an address and to make the most necessary arrangements, and immediately passed on to Etruria, that in concert with Metellus he might dislodge his antagonists from Northern Italy.
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Reference address : https://www.ellopos.net/elpenor/rome/4-09-cinna-sulla.asp?pg=42