<span>Conquered people liked Islam's values and the way they would be treated under it so they decided to convert willingly rather than being forced to leading to more loyal citizens. </span><span>and </span><span> Muslims were unified The splendors of Baghdad The treatment of conquered people . Empire of Caliphs The First Caliph Harshness of Persia and the Byzantines Weakness of Persia and the Byzantines Muslims in Europe </span>I hope this helps!