 The strongest opposition came from Ahmad ibn Hajji of the Al Mira, relatives of the Al Fadl through their shared ancestor Rabi'ah ibn Hazim, whose descendants were collectively known as the Banu Rabi'ah.Ahmad ibn Hajji and his tribe were considered by the historians of their day as the kings of the Arabs ("muluk al-ʿarab") of the southern Syrian Desert, and Ahmad ibn Hajji led the struggle against Isa for the official post of "amir al-ʿarab".Their conflict dissipated as the Mamluks gave the Al Mira virtual independence in the southern desert, while maintaining Isa as "amir al-ʿarab".