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
There Lysimachia was taken from the Aetolian garrison, and Perinthus, which stood in the relation of clientship to Byzantium, was likewise occupied. Thus the peace was broken as respected the Byzantines; and as respected the Aetolians, who had just made peace with Philip, the good understanding was at least disturbed.
The crossing to Asia was attended with no difficulties, for Prusias king of Bithynia was in alliance with Macedonia. By way of recompense, Philip helped him to subdue the Greek mercantile cities in his territory. Chalcedon submitted. Cius, which resisted, was taken by storm and levelled with the ground, and its inhabitants were reduced to slavery--a meaningless barbarity, which annoyed Prusias himself who wished to get possession of the town uninjured, and which excited profound indignation throughout the Greek world.
The Aetolians, whose -strategus- had commanded in Cius, and the Rhodians, whose attempts at mediation had been contemptuously and craftily frustrated by the king, were especially offended.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=23