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
Farther to the south, moreover, the corsairs established themselves in Phoenice, the most flourishing town of Epirus; partly voluntarily, partly by constraint, the Epirots and Acarnanians entered into an unnatural symmachy with the foreign freebooters; the coast was insecure even as far as Elis and Messene. In vain the Aetolians and Achaeans collected what ships they had, with a view to check the evil: in a battle on the open sea they were beaten by the pirates and their Greek allies; the corsair fleet was able at length to take possession even of the rich and important island of Corcyra (Corfu).
The complaints of Italian mariners, the appeals for aid of their old allies the Apolloniates, and the urgent entreaties of the besieged Issaeans at length compelled the Roman senate to send at least ambassadors to Scodra. The brothers Gaius and Lucius Coruncanius went thither to demand that king Agron should put an end to the disorder. The king answered that according to the national law of the Illyrians piracy was a lawful trade, and that the government had no right to put a stop to privateering; whereupon Lucius Coruncanius replied, that in that case Rome would make it her business to introduce a better law among the Illyrians.
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Reference address : https://www.ellopos.net/elpenor/rome/3-03-extension-italy.asp?pg=21