 Edward Gibbon however says Aetius never showed his greatness more clearly in managing to harass and slow Attila's advance with only a shadow force.Attila finally halted at the Po, where he met an embassy including the prefect Trygetius, the ex-consul Gennadius Avienus, and Pope Leo I.After the meeting he turned his army back, having gained neither Honoria's hand nor the territories he desired.