Byzantine military governorate of reconquered North Africa, lost to the Arabs at the fall of Carthage.
The Exarchate of Africa was overrun by Umayyad forces under Hassan ibn al-Nu'man in 698 CE; the Battle of Carthage that year ended Byzantine resistance, and the city was deliberately destroyed to prevent reconquest, extinguishing the exarchate.
A detailed study of Byzantine military administration in Africa down to the Arab conquest.
The Arab conquest and fall of Carthage that ended the exarchate.