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
Add to this the personal impression, which most of these Peloponnesian statesmen produced in Rome; even Flamininus shook his head, when one of them showed him on the one day how to perform some dance, and on the next entertained him with affairs of state. Matters went so far, that the senate at last lost patience and informed the Peloponnesians that it would no longer listen to them, and that they might do what they chose (572).
This was natural enough, but it was not right; situated as the Romans were, they were under a moral and political obligation earnestly and steadfastly to rectify this melancholy state of things. Callicrates the Achaean, who went to the senate in 575 to enlighten it as to the state of matters in the Peloponnesus and to demand a consistent and calm intervention, may have had somewhat less worth as a man than his countryman Philopoemen who was the main founder of that patriotic policy; but he was in the right.
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Reference address : https://www.ellopos.net/elpenor/rome/3-09-war-antiochus-asia.asp?pg=56