Aside from Anastasius II's preparations (which might have been neglected following his deposition), the Byzantines could count on the assistance of the Bulgars, with whom Leo concluded a treaty that possibly included alliance against the Arabs.
Selain dari persiapan Anastasios II (yang mungkin telah diabaikan menyusul penggulingannya, Bizantium dibantu oleh Bulgar, yang bersama Leo telah menyepakati perjanjian yang kemungkinan meliputi persekutuan melawan Arab.