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.
Mark Antony
While Antony was serving Gabinius in the East, the domestic political situation had changed in Rome. In 60 BC, a secret agreement (known as the "First Triumvirate") was entered into between three men to control the Republic: Marcus Licinius Crassus, Gnaeus Pompey Magnus, and Gaius Julius Caesar. Crassus, Rome's wealthiest man, had defeated the slave rebellion of Spartacus in 70 BC; Pompey conquered much of the Eastern Mediterranean in the 60's BC; Caesar was Rome's Pontifex Maximus and a former general in Spain. In 59 BC, Caesar, with funding from Crassus, was elected Consul to pursue legislation favorable to Crassus and Pompey's interests. In return, Caesar was assigned the governorship of Illyricum, Cisalpine Gaul, and Transalpine Gaul for five years beginning in 58 BC. Caesar used his governorship as a launching point for his conquest of free Gaul. In 55 BC, Crassus and Pompey served as Consuls while Caesar's command was extended for another five years. Rome was effectively under the absolute power of these three men. The Triumvirate used the demagogue Publius Clodius Pulcher, Antony's patron, to exile their political rivals, notably Cicero and Cato the Younger.