From this position , he also launched expeditions to aid the Muslim emirates of the Byzantine frontier zone ( the Thughur ) against the advancing Byzantines .
From this position , he also intervened in Armenia to reverse growing Byzantine influence ( see below ) .
From this position , he also launched expeditions to aid the Muslim emirates of the Byzantine frontier zone ( the Thughur ) against the advancing Byzantines , and intervened in Armenia to reverse growing Byzantine influence ( see below ) .