history of Arabia
The dynasty of the Ghassānids, though often called kings, were in fact Byzantine phylarchs (native rulers of subject frontier states). They had their headquarters well within the Byzantine Empire, a little east of the Sea of Galilee at Jābiyyah in the Jawlān (Golan) area, but they controlled large areas of northwestern Arabia, as far south as Yathrib, serving as a counterpoise to the Sāsānian-oriented Lakhmids in the northeast. The Ghassānids were Monophysite Christians and played an important part in the religious conflicts of the Byzantine church. Their influence spanned the 6th century ce, and their most prominent member, al-Ḥārith ibn Jabalah (Greek: Aretas), flourished in mid-century. The last three phylarchs fell out with Orthodox Byzantium because of their Monophysite creed; in 614 the power of Ghassān was destroyed by a Persian invasion.Ghassān