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
Thus the most important maritime stations in the Adriatic became subject, like Sicily and Sardinia, to the authority of Rome. What other result was to be expected? Rome was in want of a good naval station in the upper Adriatic--a want which was not supplied by her possessions on the Italian shore; her new allies, especially the Greek commercial towns, saw in the Romans their deliverers, and doubtless did what they could permanently to secure so powerful a protection; in Greece itself no one was in a position to oppose the movement; on the contrary, the praise of the liberators was on every one's lips.
It may be a question whether there was greater rejoicing or shame in Greece, when, in place of the ten ships of the line of the Achaean league, the most warlike power in Greece, two hundred sail belonging to the barbarians now entered her harbours and accomplished at a blow the task, which properly belonged to the Greeks, but in which they had failed so miserably. But if the Greeks were ashamed that the salvation of their oppressed countrymen had to come from abroad, they accepted the deliverance at least with a good grace; they did not fail to receive the Romans solemnly into the fellowship of the Greek nation by admitting them to the Isthmian games and the Eleusinian mysteries.
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Reference address : https://www.ellopos.net/elpenor/rome/3-03-extension-italy.asp?pg=24