Religion
Among the ruling class, Trinitarian Christianity was replaced by Arianism under the Germanic kingdom of the Vandals, which was established in 430, when the Vandals crossed the Strait of Gibraltar. The Vandal kingdom was extinguished by the Byzantine armies circa 533, but most of Mauretania Caesariensis remained under the control of local Moorish rulers such as Mastigas, and it was not until the 560s and 570s that Byzantine control was established in the interior. The Byzantine Exarchate of Africa was in its turn overrun by the Muslim caliphate under the Umayyad dynasty, ending Late Antique Roman culture there; most of former Mauretania Caesariensis became part of the westernmost Islamic province, henceforth called (al-)Maghrib.
Read more about this topic: Mauretania Caesariensis