Tiberius, after returning from the East in…

Tiberius, after returning from the East in 19 BCE, had been married to Vipsania Agrippina, the daughter of Augustus’s close friend and greatest general, Marcus Vipsanius Agrippa, appointed praetor, and sent with his legions to assist his brother Drusus in campaigns in the west.

While Drusus focuses his forces in Gallia Narbonensis and along the German frontier, Tiberius combats the tribes in the Alps and within Transalpine Gaul, annexing Raetia, comprising Vorarlberg and Tirol states in present-day Austria, the eastern cantons of Switzerland, and parts of Bavaria and Baden-Württemberg states in Germany, and Noricum, apparently as a bloodless conquest.

Roughly comprising modern central Austria and parts of Bavaria, Germany, the kingdom had been controlled by a Celtic confederacy that dominated an earlier Illyrian population.

At its greatest extent, it includes on the east Carnuntum (about twenty miles [thirty-two kilometers] east of Vindobona [now Vienna]), …