 He avenged the Roman Empire's defeat in the Teutoburg Forest and retrieved two of the three legionary eagles that had been lost during the battle.In AD 17 he returned to Rome where he received a triumph before leaving to reorganize the provinces of Asia Minor, whereby he incorporated the provinces of Cappadocia and Commagene in AD 18.While in the eastern provinces, he came into conflict with the governor of Syria, Gnaeus Calpurnius Piso.