The correct answer is Belisarius.
Flavius Belisarius was the most famous Byzantine general in the History of the Byzantine Empire and he was a military protagonist of the Byzantine expansion in the Western Mediterranean during the rule of Justinian I. In the year 533 the emperor named Belisarius commander of a great maritime and terrestrial expedition against the Vandals, who were settled in Carthage. One year later Belisarius returned to Constantinople victorious, having taken Carthage and the North of Africa for the Byzantine Empire.
In 535, a new expedition was commanded by him against the Goths, who were settled in the territories of the extinct Western Roman Empire in the Italian peninsula. He was victorious once again, conquering Sicily, Rome, Milan, and Ravenna, where he captured the Ostrogoth king Vitiges. After this expedition he was sent by Justinian to Syria to fight the Persian Sassanian Empire, because Justinian was afraid that all these victories were giving too much power to Belisarius.