The main sources on his life are the epic poem Iohannis of Flavius Cresconius Corippus and the Histories of the Wars of Procopius of Caesarea.
In 543, however, a revolt broke out among the Berbers of Byzacena, which resulted in the execution of his brother Guarizila and the cessation of the subsidies by the Byzantine governor, Solomon.
[4][5] With the death of the capable Solomon, his nephew Sergius, whose arrogant treatment of the Leuathae had prompted their rebellion in the first place, was appointed governor in Africa.
Stotzas, a renegade Byzantine soldier who had led an unsuccessful rebellion a few years earlier, now joined Antalas from his refuge in Mauretania.
[7] Finally, in late 545 Areobindus ordered the reluctant John to advance and meet the joint army of Antalas and Stotzas, which was encamped at Sicca Veneria.
John's troops were considerably outnumbered by the rebel forces, and in the Battle of Thacia his army was routed and he himself was killed, but not before mortally wounding Stotzas in a duel.
There, in an effort to reconcile himself with the emperor, he contacted the dux of Byzacena, Marcentius, who had fled to an offshore island, proposing to make common cause against Guntharic.
[12][13] In the summer, however, Antalas joined the Berbers of Tripolitania (though he is not mentioned by Corippus, Procopius records his presence) and inflicted a heavy defeat on Troglita at the Battle of Marta.
Nevertheless, when the two adversaries met later in the summer in the Battle of the Fields of Cato, the result was a decisive Byzantine victory: Carcasan fell, and the Berber revolt was crushed as Antalas and the surviving leaders submitted to Troglita.