When the Fatimid al-Mahdi died in 944, Abū Yazīd launched a rebellion in the Aures mountains and declared himself Shaykh al-Mu'minīn "Elder of the Believers", seeking aid from the Umayyads of Andalus.
Abu Yazid (873–947), Kharijite Berber of the Banu Ifran tribe
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The early Fatimid Caliphate was nearly overthrown in the 10th century by the rebel Abu Yazid, known as the "Man on the Donkey", while in Morocco the 12th century founder of the Almohad movement, Ibn Tumart, insisted on riding a donkey.