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
To the west of these began the kingdom of Asia, which, although
diminished under Antiochus the Great, still stretched its unwieldy
bulk from the Hellespont to the Median and Persian provinces, and
embraced the whole basin of the Euphrates and Tigris. That king had
still carried his arms beyond the desert into the territory of the
Parthians and Bactrians; it was only under him that the vast state
had begun to melt away.
Not only had western Asia been lost in
consequence of the battle of Magnesia; the total emancipation of the
two Cappadocias and the two Armenias--Armenia proper in the northeast
and the region of Sophene in the south-west--and their conversion
from principalities dependent on Syria into independent kingdoms
also belong to this period.(38)
