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
Generally, the relations of Rome with the Hellenistic states became closer; the senate already negotiated even with Syria, and interceded with the Seleucus just mentioned on behalf of the Ilians with whom the Romans claimed affinity.
For a direct interference of the Romans in the affairs of the eastern powers there was no immediate need. The Achaean league, the prosperity of which was arrested by the narrow-minded coterie- policy of Aratus, the Aetolian republic of military adventurers, and the decayed Macedonian empire kept each other in check; and the Romans of that time avoided rather than sought transmarine acquisitions.
When the Acarnanians, appealing to the ground that they alone of all the Greeks had taken no part in the destruction of Ilion, besought the descendants of Aeneas to help them against the Aetolians, the senate did indeed attempt a diplomatic mediation; but when the Aetolians returned an answer drawn up in their own saucy fashion, the antiquarian interest of the Roman senators by no means provoked them into undertaking a war by which they would have freed the Macedonians from their hereditary foe (about 515).
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/3-03-extension-italy.asp?pg=19