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
In Asia Minor, after the Seleucids were driven back, the kingdom
of Pergamus had become the first power. Not led astray by
the traditions of the Alexandrine monarchies, but sagacious and
dispassionate enough to renounce what was impossible, the Attalids
kept quiet; and endeavoured not to extend their bounds nor to
withdraw from the Roman hegemony, but to promote the prosperity of
their empire, so far as the Romans allowed, and to foster the arts
of peace. Nevertheless they did not escape the jealousy and suspicion
of Rome.
In possession of the European shore of the Propontis,
of the west coast of Asia Minor, and of its interior as far as
the Cappadocian and Cilician frontiers, and in close connection with
the Syrian kings--one of whom, Antiochus Epiphanes (d. 590), had
ascendedthe throne by the aid of the Attalids--king Eumenes II had
by his power, which seemed still more considerable from the more and
more deep decline of Macedonia and Syria, instilled apprehension
in the minds even of its founders.