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
But while in Greece proper the moral and political energy of the people had decayed, the day of national vigour seemed to have gone by, life appeared scarce worth living for, and even of the better spirits one spent time over the wine-cup, another with the rapier, a third beside the student's lamp; while in the east and Alexandria the Greeks were able perhaps to disseminate elements of culture among the dense native population and to diffuse among that population their language and their loquacity, their science and pseudo-science, but were barely sufficient in point of number to supply the nations with officers, statesmen, and schoolmasters, and were far too few to form even in the cities middle- class of the pure Greek type; there still existed, or the other hand, in northern Greece a goodly portion of the old national vigour, which had produced the warriors of Marathon.
Hence arose the confidence with which the Macedonians, Aetolians, and Acarnanians, wherever they made their appearance in the east, claimed to be, and were taken as, a better race; and hence the superior part which they played at the courts of Alexandria and Antioch. There is a characteristic story, that an Alexandrian who had lived for a considerable time in Macedonia and had adopted the manners and the dress of that country, on returning to his native city, now looked upon himself as a man and upon the Alexandrians as little better than slaves.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=2