Julio-Claudian dynasty reign as being strongly influenced by his mother Agrippina, his tutor Seneca, and the Praetorian Prefect Burrus, especially in the first year. He was made Emperor over his step-brother, Claudius' son Britannicus, who he had killed. Agrippina was believed to have poisoned Claudius, having allegedly poisoned her second husband Gaius Sallustius Crispus Passienus. She had also arranged the deaths of Caligula's third wife, Lollia Paulina and Messalina's mother Domitia Lepida the Younger. She saw that the dynasty's numbers dwindle with the execution of Marcus Junius Silanus Torquatus, a grandson of Julia the Younger, to strengthen Nero's claim, having previously arranged
Agrippina the Elder the soldiers to deal with the ringleaders, which they did with brutal severity. He then led them against the Germanic tribes, perhaps in an effort to prevent future mutiny. Germanicus would remain in Gaul fighting against the Germanic tribes until AD 16, at which time he was recalled to Rome by Tiberius. His campaigns won him much renown among the Roman people, and he was awarded a triumph on 26 May AD 17. In AD 18, Agrippina left for the eastern provinces with her family. Germanicus was sent the east to govern the provinces, the same assignment her father was