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
In this case the Rhodians were their chief auxiliaries; they emphatically supported Sinope, for instance, against Mithradates of Pontus. How firmly amidst the quarrels, and by means of the very differences, of the monarchs the liberties of these cities of Asia Minor were established, is shown by the fact, that the dispute between Antiochus and the Romans some years after this time related not to the freedom of these cities in itself, but to the question whether they were to ask confirmation of their charters from the king or not.
This league of the cities was, in this peculiar attitude towards the lords of the soil as well as in other respects, a formal Hanseatic association, headed by Rhodes, which negotiated and stipulated in treaties for itself and its allies.
This league upheld the freedom of the cities against monarchical interests; and while wars raged around their walls, public spirit and civic prosperity were sheltered in comparative peace within, and art and science flourished without the risk of being crushed by a dissolute soldiery or corrupted by the atmosphere of a court.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=17