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Indeed, under Septimius Severus (AD 193 ), Numidia was separated from Africa Vetus, and governed by an imperial procurator. Under the new organization of the empire by Diocletian, Numidia was divided in two provinces: the north became "Numidia Cirtensis", with capital at Cirta, while the south, which included the Aurès Mountains and was threatened by raids, became "Numidia Militiana", "Military Numidia", with capital at the legionary base of Lambaesis.