Angrivarii
The wars began in the last years of the reign of Augustus, first emperor of Rome. Augustus died an old but respected man in the year 14 and was celebrated with much pomp and splendor. He left a document to be read to the senate posthumously, expressly forbidding extension of the empire beyond the Rhine. News of the will was welcomed by the Germans, thinking it gave them a free hand in the region. Germanicus found it necessary to pacify the border, which he did by a combination of scorched earth raids and offers of alliance with Rome - in short, stick and carrot. These raids also kept the army of the lower Rhine distracted from the possibility of mutiny, which had broken out on Augustus's death and only been quelled by concessions and executions.
Roman triumph
Following Caesar's murder, Octavian assumed permanent title of "imperator" and became permanent head of the Senate from 27 BCE (see principate) under the title and name Augustus. Only the year before, he had blocked the senatorial award of a triumph to Marcus Licinius Crassus the Younger, despite the latter's acclamation in the field as Imperator and his fulfillment of all traditional, Republican qualifying criteria except full consulship. Technically, generals in the Imperial era were legates of the ruling Emperor (Imperator). Augustus claimed the victory as his own but permitted Crassus a second, which is listed on the "Fasti" for 27 BCE. Crassus was also denied the rare (and technically permissible, in his case) honour of dedicating the "spolia opima" of this campaign to Jupiter Feretrius.