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
Unprejudiced persons, however, will not fail to see that Flamininus managed these difficult affairs as fairly and justly as it was possible to manage them where two political parties, both chargeable with unfairness and injustice stood opposed to each other. With the old and deep hostility subsisting between the Spartans and Achaeans, the incorporation of Sparta into the Achaean league would have been equivalent to subjecting Sparta to the Achaeans, a course no less contrary to equity than to prudence. The restitution of the emigrants, and the complete restoration of a government that had been set aside for twenty years, would only have substituted one reign of terror for another; the expedient adopted by Flamininus was the right one, just because it failed to satisfy either of the extreme parties.
At length thorough provision appeared to be made that the Spartan system of robbery by sea and land should cease, and that the government there, such as it was, should prove troublesome only to its own subjects. It is possible that Flamininus, who knew Nabis and could not but be aware how desirable it was that he should personally be superseded, omitted to take such a step from the mere desire to have done with the matter and not to mar the clear impression of his successes by complications that might be prolonged beyond all calculation; it is possible, moreover, that he sought to preserve Sparta as a counterpoise to the power of the Achaean confederacy in the Peloponnesus. But the former objection relates to a point of secondary importance; and as to the latter view, it is far from probable that the Romans condescended to fear the Achaeans.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=67