Tiberius shared in Augustus' tribune powers as of 6 BC, but soon went into retirement in Rhodes. He was reported as wanting no further role in politics. After the early deaths of Augustus' young grandchildren-turned-sons, Lucius and Gaius in AD 2 and 4 respectively, and the earlier death of his own brother Drusus (9 BC), Tiberius was recalled to Rome in June AD 4, where he was adopted by Augustus on the condition that he, in turn, adopt his nephew Germanicus. This continued the tradition of presenting at least two generations of heirs.