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
The Roman government, after having achieved the victory, had to arrange the affairs of Asia Minor and of Greece. If the Roman rule was here to be erected on a firm foundation, it was by no means enough that Antiochus should have renounced the supremacy in the west of Asia Minor. The circumstances of the political situation there have been set forth above.(6)
6. Cf. III. VIII. The Celts of Asia Minor ff.
The Greek free cities on the Ionian and Aeolian coast, as well as the kingdom of Pergamus of a substantially similar nature, were certainly the natural pillars of the new Roman supreme power, which here too came forward essentially as protector of the Greeks kindred in race. But the dynasts in the interior of Asia Minor and on the north coast of the Black Sea had hardly yielded for long any serious obedience to the kings of Asia, and the treaty with Antiochus alone gave to the Romans no power over the interior.
It was indispensable to draw a certain line within which the Roman influence was henceforth to exercise control. Here the element of chief importance was the relation of the Asiatic Greeks to the Celts who had been for a century settled there. These had formally apportioned among them the regions of Asia Minor, and each one of the three cantons raised its fixed tribute from the territory laid under contribution.
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Reference address : https://www.ellopos.net/elpenor/rome/3-09-war-antiochus-asia.asp?pg=37