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
Philip Proceed to Thessaly - Battle of Cynoscephalae
Thus the fourth campaign, that of 557, began. Flamininus despatched a part of the fleet against the Acarnanians, who were besieged in Leucas; in Greece proper he became by stratagem master of Thebes, the capital of Boeotia, in consequence of which the Boeotians were compelled to join at least nominally the alliance against Macedonia. Content with having thus interrupted the communication between Corinth and Chalcis, he proceeded to the north, where alone a decisive blow could be struck.
The great difficulties of provisioning the army in a hostile and for the most part desolate country, which had often hampered its operations, were now to be obviated by the fleet accompanying the army along the coast and carrying after it supplies sent from Africa, Sicily, and Sardinia. The decisive blow came, however, earlier than Flamininus had hoped. Philip, impatient and confident as he was, could not endure to await the enemy on the Macedonian frontier: after assembling his army at Dium, he advanced through the pass of Tempe into Thessaly, and encountered the army of the enemy advancing to meet him in the district of Scotussa.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=56