Illyricum

As the expeditions against the Pannonians and the Germans were, as it were, a repetition of the Raetian campaign on a more extended scale, so the leaders, who were put at their head with the title of imperial legates, were the same—once more the two princes of the imperial house, Tiberius, who, in the place of Agrippa, took up the command in Illyricum, and Drusus, who went to the Rhine, both now no longer inexperienced youths, but men in the prime of their years, and well fitted to take in hand severe work.

Source: tatoeba (11767263)

In the earlier historical times the whole of the eastern part of the Balkan peninsula between the Danube and the Aegean was known as Thracia, while the western part (north of the forty-first degree of latitude) was termed Illyricum; the lower basin of the river Vardar (the classical Axius) was called Macedonia.

Source: tatoeba (12048483)