The main goal of the government for Justinian was the restoration of the Roman Empire. In this he achieved significant success (thanks to his military leaders).
Africa was the first target of Byzantium. At that time, vandals were in charge there. The vandals were defeated, Africa became part of the empire.
This was followed by the turn of Italy, where the Ostrogoths founded their kingdom. This war was protracted. Italy was also annexed to the empire.
Justinian also managed to recapture part of Spain and an island in the western Mediterranean.
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