 Cassius Dio wrote that in AD 7, Augustus sent Tiberius' nephew Germanicus to Illyricum because Tiberius’ lack of activity made him suspicious that Tiberius was intentionally delaying the war so as to remain under arms as long as possible.Augustus seems to have been displeased with what he must have considered a passive strategy.However, Tiberius was very active and was conducting a war of attrition and counter-insurgency operations.