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
Two years later his colleague Pyrganion even landed at the same port, established himself there and sent forth flying parties into the island, till the Roman governor at last compelled him to re-embark. People grew at length quite accustomed to the fact that all the provinces equipped squadrons and raised coastguards, or were at any rate taxed for both; and yet the pirates appeared to plunder the provinces with as much regularity as the Roman governors.
But even the sacred soil of Italy was now no longer respected by the shameless transgressors: from Croton they carried off with them the temple-treasures of the Lacinian Hera; they landed in Brundisium, Misenum, Caieta, in the Etruscan ports, even in Ostia itself; they seized the most eminent Roman officers as captives, among others the admiral of the Cilician army and two praetors with their whole retinue, with the dreaded -fasces- themselves and all the insignia of their dignity; they carried away from a villa at Misenum the very sister of the Roman admiral-in-chief Antonius, who was sent forth to annihilate the pirates; they destroyed in the port of Ostia the Roman war fleet equipped against them and commanded by a consul.
The Latin husbandman, the traveller on the Appian highway, the genteel bathing visitor at the terrestrial paradise of Baiae were no longer secure of their property or their life for a single moment; all traffic and all intercourse were suspended; the most dreadful scarcity prevailed in Italy, and especially in the capital, which subsisted on transmarine corn. The contemporary world and history indulge freely in complaints of insupportable distress; in this case the epithet may have been appropriate.
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Reference address : https://www.ellopos.net/elpenor/rome/5-02-rule-sullan-restoration.asp?pg=67