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
Return of the Romans
But, although Philip's army was after this unfortunate action no longer able to prevent the advance of the Romans, the latter were themselves afraid to encounter further unknown dangers in an impassable and hostile country; and returned to Apollonia, after they had laid waste the fertile provinces of Upper Macedonia--Eordaea, Elymaea, and Orestis. Celetrum, the most considerable town of Orestis (now Kastoria, on a peninsula in the lake of the same name), had surrendered to them: it was the only Macedonian town that opened its gates to the Romans. In the Illyrian land Pelium, the city of the Dassaretae, on the upper confluents of the Apsus, was taken by storm and strongly garrisoned to serve as a future basis for a similar expedition.
Philip did not disturb the Roman main army in its retreat, but turned by forced marches against the Aetolians and Athamanians who, in the belief that the legions were occupying the attention of the king, were fearlessly and recklessly plundering the rich vale of the Peneius, defeated them completely, and compelled such as did not fall to make their escape singly through the well-known mountain paths. The effective strength of the confederacy was not a little diminished by this defeat, and not less by the numerous enlistments made in Aetolia on Egyptian account. The Dardani were chased back over the mountains by Athena-goras, the leader of Philip's light troops, without difficulty and with severe loss.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=47