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
Greek National Party
Among the unhappy nation of the Greeks Philip and Perseus had, long before declaring war against Rome carried on a lively double system of proselytizing, attempting to gain over to the side of Macedonia on the one hand the national, and on the other--if we may be permitted the expression--the communistic, party.
As a matter of course, the whole national party among the Asiatic as well as the European Greeks was now at heart Macedonian; not on account of isolated unrighteous acts on the part of the Roman deliverers, but because the restoration of Greek nationality by a foreign power involved a contradiction in terms, and now, when it was in truth too late, every one perceived that the most detestable form of Macedonian rule was less fraught with evil for Greece than a free constitution springing from the noblest intentions of honourable foreigners.
That the most able and upright men throughout Greece should be opposed to Rome was to be expected; the venal aristocracy alone was favourable to the Romans, and here and there an isolated man of worth, who, unlike the great majority, was under no delusion as to the circumstances and the future of the nation.
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Reference address : https://www.ellopos.net/elpenor/rome/3-10-third-macedonian-war.asp?pg=13