Pope Gregory II
The Exarch of Ravenna, Eutychius (), was sent to suppress Tiberius revolt. Eutychius was short on manpower, thus Pope Gregory II (), who did not support Leo III, but opposed the creation of rival emperors, sent several bishops, as well as Papal forces to support Eutychius. Their combined armies marched to Castrum Manturianense, crushed the rebellion in battle, and killed Tiberius. After killing Tiberius, Eutychius sent his head to Leo III.