Did Constantine V use the civil war in the Muslim world to his advantage?
No
Yes, he made limited offensives on the Arab frontier
Yes, he declared war on all Muslim countries
Yes, he tried to mediate peace
Answer
Constantine V did use the civil war in the Muslim world to his advantage, making limited offensives on the Arab frontier. He hoped to take advantage of the chaos and bring back the territories that had been lost to the Arabs in the previous century.
The Reign of Constantine V: Unveiling the Byzantine Emperor's Legacy