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 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.
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Reference address : https://www.ellopos.net/elpenor/rome/3-08-second-macedonian-war.asp?pg=4