Carcasan was a libyan ruler of Ifuraces tribes in Libya that resided in Tripolitania and commander of Antalas coalition army left wing recorded during the Corippus records of the battle of Sufetula made of tribes from great and little Syrtis (Today's Sirte name is related to this old historical name) was active during the Berber insurrections in the Praetorium Prefecture of Africa in the mid-6th century. He first appears in the reports of General John Troglita's campaign in the winter of 546/547, when he was defeated with Antalas and other Berber leaders by Byzantine troops thanks notably to the major contribution of Berbers federates. In the spring of 547, after the death of the Laguatan chief Ierna and priest of Gurzil son of Imen, he united the scattered Berber tribes and was acclaimed as a leader by them. After consulting the oracle of Amon, he resumed the war against the Byzantines and inflicted a heavy defeat on them during the Battle of Marta while he was on the way to join the leader of the rebel army Antalas in Byzacena to then attack as far as Carthage capital of the Byzantine Prefecture of Africa and where they were able to deal several attacks weakening the Byzantines in Africa and according to Procopius "done horrible acts on it's inhabitants".

In the spring of 548, he and Antalas clashed again with John and his allies Cusina, Ifisdaïas (and his son Bitiptes both already here before in the battle of sufetula), Iabdas (and his son Bezina). The Berber troops in revolt marched against John Troglita and camped in the plain of Mammès. Carcasan, confident after his victory last year, wishes to confront John's army immediately, but he gives way to Antalas, who advocates a more cautious tactic as the Byzantines forces outnumber their forces due to the berbers chieftains allied to the empire, withdrawing and luring the Byzantines inland, forcing them to march away from their supply bases, and across the devastated country, with the aim of exhausting and demoralizing them. The Berber rebels put Antalas' tactics into practice which worked well and caused a mutiny in John's army despite he planned a line of supply throught sea, but when they camped in the plain of Caton's fields, in Latara, they decided to fight in pitched battle. In the ensuing confrontation, the Byzantines and their Berber allies were victorious and Carcasan, during a counterattack, was killed by Jean Troglita himself according to Corippe (According the Iohannis, which is at first a propagandist poetry despite the poetic ability of Corippus to reveal the true story added with details on the Romans fault but it was also a glorious epic for the Roman Prefect and magister militum John Troglita).