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
Gaius Lucretius was unanimously condemned by the burgesses. But such steps could not alter the fact, that the military result of these first two campaigns had been null, while the political result had been a foul stain on the Romans, whose extraordinary successes in the east were based in no small degree on their reputation for moral purity and solidity as compared with the scandals of Greek administration.
Had Philip commanded instead of Perseus, the war would presumably have begun with the destruction of the Roman army and the defection of most of the Greeks; but Rome was fortunate enough to be constantly outstripped in blunders by her antagonists.
Perseus was content with entrenching himself in Macedonia--which towards the south and west is a true mountain- fortress--as in a beleaguered town.
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Reference address : https://www.ellopos.net/elpenor/rome/3-10-third-macedonian-war.asp?pg=26