King of the Vandals 523-530. Hilderic succeeded Thrasamund as King of the Vandals in 523. An Arian himself, he tolerated Catholocism. He allied himself with the Byzantine Empire, thus breaking a treaty with the Ostrogoths. He was saved from death by the death of Theodoric the Great, King of the Ostrogoths, who was planning an invasion of Africa when he died. The Vandal kingdom was on a steady downfall with losses in northern Africa to the Moors when he died in 530. He was succeeded by Gelimer, the last King of the Vandals.