The Eastern Roman historian Procopius mentions a Berber king called "Massonas", often assumed to be the same person as Masuna, as having allied with the forces of the Eastern Roman Empire in the 530s against the Vandal Kingdom in the Vandalic War. Masuna is assumed to have been among the Berber rulers that willingly submitted to Belisarius and the Eastern Roman forces, demanding in return the symbols of their offices; a silver crown, a staff of silver gilt, a tunic and gilded boots.