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
Ferment in Italy
This state of suspense and uncertainty existing in Italy when Sulla took his departure for Greece in the beginning of 667 has been already described: the half-suppressed insurrection, the principal army under the more than half-usurped command of a general whose politics were very doubtful, the confusion and the manifold activity of intrigue in the capital. The victory of the oligarchy by force of arms had, in spite or because of its moderation, engendered manifold discontent.
The capitalists, painfully affected by the blows of the most severe financial crisis which Rome had yet witnessed, were indignant at the government on account of the law which it had issued as to interest, and on account of the Italian and Asiatic wars which it had not prevented. The insurgents, so far as they had laid down their arms, bewailed not only the disappointment of their proud hopes of obtaining equal rights with the ruling burgesses, but also the forfeiture of their venerable treaties, and their new position as subjects utterly destitute of rights.
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Reference address : https://www.ellopos.net/elpenor/rome/4-09-cinna-sulla.asp