 In addition to the recovery of two of the three lost eagles, Germanicus had fought Arminius, the leader who destroyed the three Roman legions in 9 AD, and defeated him in numerous battles.In leading his troops across the Rhine without recourse to Tiberius, he contradicted the advice of Augustus to keep that river as the boundary of the empire, and opened himself to potential doubts from Tiberius about his motives in taking such independent action.This error in political judgment gave Tiberius reason to controversially recall his nephew.