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
On the opposite Thracian frontier they appear to have given themselves little concern about their neighbours; except that there is mention made in 651 of conflicts with the Thracians, and in 657 of others with the Maedi in the border mountains between Macedonia and Thrace.
More serious conflicts took place in the Illyrian land, where complaints were constantly made as to the turbulent Dalmatians by their neighbours and those who navigated the Adriatic; and along the wholly exposed northern frontier of Macedonia, which, according to the significant expression of a Roman, extended as far as the Roman swords and spears reached, the conflicts with the barbarians never ceased.
In 619 an expedition was undertaken against the Ardyaei or Vardaei and the Pleraei or Paralii, a Dalmatian tribe on the coast to the north of the mouth of the Narenta, which was incessantly perpetrating outrages on the sea and on the opposite coast: by order of the Romans they removed from the coast and settled in the interior, the modern Herzegovina, where they began to cultivate the soil, but, unused to their new calling, pined away in that inclement region.
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Reference address : https://www.ellopos.net/elpenor/rome/4-05-peoples-north.asp?pg=19