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
Most of the half-free cities had submitted to Antiochus, but some of them, more especially the important cities of Smyrna, Alexandria Troas, and Lampsacus, had, on learning the discomfiture of Philip, likewise taken courage to resist the Syrian; and their urgent entreaties were combined with those of the Rhodians.
It admits of no doubt, that Antiochus, so far as he was at all capable of forming a resolution and adhering to it, had already made up his mind not only to attach to his empire the Egyptian possessions in Asia, but also to make conquests on his own behalf in Europe and, if not to seek on that account a war with Rome, at any rate to risk it The Romans had thus every reason to comply with that request of their allies, and to interfere directly in Asia; but they showed little inclination to do so.
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Reference address : https://www.ellopos.net/elpenor/rome/3-09-war-antiochus-asia.asp?pg=5