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
Of these states Great Armenia in
particular, under the Artaxiads, soon attained to a considerable
position. Wounds perhaps still more dangerous were inflicted on the
empire by the foolish levelling policy of his successor Antiochus
Epiphanes (579-590).
Although it was true that his kingdom resembled
an aggregation of countries rather than a single state, and that the
differences of nationality and religion among his subjects placed the
most material obstacles in the way of the government, yet the plan
of introducing throughout his dominions Graeco-Roman manners and
Graeco-Roman worship and of equalizing the various peoples in a
political as well as a religious point of view was under any
circumstances a folly; and all the more so from the fact, that
this caricature of Joseph II was personally far from equal to so
gigantic an enterprise, and introduced his reforms in the very worst
way by the pillage of temples on the greatest scale and the most
insane persecution of heretics.