Respuesta :
I believe it was Justinian that managed to unite Rome, and expanding the Byzantine Empire.
Answer:
Emperor Justinian
Explanation:
Justinian was the Emperor of the Eastern Roman Empire from AD 527 to 565. He was the First Byzantine emperor. His main objective was to reunite the Roman Empire because he considered himself a Roman Emperor and because of that he expanded the Byzantine empire to parts of Africa, Italy, and the Balkans.