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
Province of Macedonia
The four Macedonian confederacies had not voluntarily submitted to the pretender, but had simply yielded to force. According to the policy hitherto pursued there was therefore no reason for depriving the Macedonians of the shadow of independence which the battle of Pydna had still left to them; nevertheless the kingdom of Alexander was now, by order of the senate, converted by Metellus into a Roman province. This case clearly showed that the Roman government had changed its system, and had resolved to substitute for the relation of clientship that of simple subjects; and accordingly the suppression of the four Macedonian confederacies was felt throughout the whole range of the client-states as a blow directed against all.
The possessions in Epirus which were formerly after the first Roman victories detached from Macedonia--the Ionian islands and the ports of Apollonia and Epidamnus,(16) that had hitherto been under the jurisdiction of the Italian magistrates--were now reunited with Macedonia, so that the latter, probably as early as this period, reached on the north-west to a point beyond Scodra, where Illyria began.
16. Cf. III. III. Acquisition of Territory in Illyria, III. IX. Macedonia
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=71