Al-Walid I
Among the first acts of Philippikos Bardanes were the deposition of Cyrus, the orthodox patriarch of Constantinople, in favour of John VI, a member of his own sect, and the summoning of a conciliabulum of Eastern bishops, which abolished the canons of the Sixth Ecumenical Council. In response the Roman Church refused to recognize the new emperor and his patriarch. Meanwhile, the Bulgarian ruler Tervel plundered up to the walls of Constantinople in 712. When Philippicus transferred an army from the Opsikion theme to police the Balkans, the Umayyad Caliphate under Al-Walid I made inroads across the weakened defenses of Asia Minor.