Political map of Europe & the Mediterranean 31 December 6 AD (Tiberius’ Campaigns in Germania): In 1 AD Augustus sent his stepson Tiberius to subdue the Germanic tribes on the Rhine frontier (Early Imperial campaigns in Germania). In his campaigns, Tiberius eventually extended the Roman border extended as far as the Elbe (Elbe River) but was forced to cancel plans to conquer the Marcomanni when revolt broke out in Illyria in 6 AD (Bellum Batonianum).