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
The strength of the empire was expended in vain endeavours
to expel the Egyptians from the provinces along the coast; in frontier
strife with the eastern peoples, the Parthians and Bactrians; in feuds
with the Celts, who to the misfortune of Asia Minor had settled within
its bounds; in constant efforts to check the attempts of the eastern
satraps and of the Greek cities of Asia Minor to achieve their
independence; and in family quarrels and insurrections of pretenders.
None indeed of the states founded by the successors of Alexander were
free from such attempts, or from the other horrors which absolute
monarchy in degenerate times brings in its train; but in the kingdom
of Asia these evils were more injurious than elsewhere, because, from
the lax composition of the empire, they usually led to the severance
of particular portions from it for longer or shorter periods.
