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
The Achaeans Enter into Alliance with Rome
The south, on the other hand, was still in the main retained under the power of Macedonia by the fortresses of Chalcis and Corinth, which maintained communication with each other through the territory of the Boeotians who were friendly to the Macedonians, and by the Achaean neutrality; and as it was too late to advance into Macedonia this year, Flamininus resolved to direct his land army and fleet in the first place against Corinth and the Achaeans.
The fleet, which had again been joined by the Rhodian and Pergamene ships, had hitherto been employed in the capture and pillage of two of the smaller towns in Euboea, Eretria and Carystus; both however, as well as Oreus, were thereafter abandoned, and reoccupied by Philocles the Macedonian commandant of Chalcis. The united fleet proceeded thence to Cenchreae, the eastern port of Corinth, to threaten that strong fortress.
On the other side Flamininus advanced into Phocis and occupied the country, in which Elatea alone sustained a somewhat protracted siege: this district, and Anticyra in particular on the Corinthian gulf, were chosen as winter quarters. The Achaeans, who thus saw on the one hand the Roman legions approaching and on the other the Roman fleet already on their own coast, abandoned their morally honourable, but politically untenable, neutrality.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=52