The peoples who were at that time settled in Hungary, Transylvania, Roumania, and Bulgaria still remained for the present beyond the horizon of the Romans; the latter came into contact only with the Thracians on the eastern frontier of Macedonia in the Rhodope mountains.
Conflicts on the Frontier In the Alps It would have been no easy task for a government more energetic than was the Roman government of that day to establish an organized and adequate defence of the frontier against these wide domains of barbarism; what was done for this important object under the auspices of the government ment of the restoration, did not come up to even the most moderate requirements.

There seems to have been no want of expeditions against the inhabitants of the Alps: in 636 there was a triumph over the Stoeni, who were probably settled in the mountains above Verona; in 659 the consul Lucius Crassus caused the Alpine valleys far and wide to De ransacked and the inhabitants to be put to death, and yet he did not succeed in killing enough of them to enable him to celebrate a village triumph and to couple the laurels of the victor with his oratorical fame.

But as the Romans remained satisfied with razzias of this sort which merely exasperated the natives without rendering them harmless, and, apparently, withdrew the troops again after every such inroad, the state of matters in the region beyond the Po remained substantially the same as before.
In Thrace 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.
In Illyria 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.

At the same time an attack was directed from Macedonia against the Scordisci, who had, it may be presumed, made common cause with the assailed inhabitants of the coast.
Soon afterwards (625) the consul Tuditanus in connection with the able Decimus Brutus, the conqueror of the Spanish Callaeci, humbled the Japydes, and, after sustaining a defeat at the outset, at length carried the Roman arms into the heart of Dalmatia as far as the river Kerka, 115 miles distant from Aquileia; the Japydes thenceforth appear as a nation at peace and on friendly terms with Rome.