Complex sentence: With the fall of Carthage in 40 BC, the territory became a Roman province until the mid- 5th century, when it was overran by Vandals, before being recovered by Byzantines.
Split into simpler sentences: With the fall of Carthage in 40 BC, the territory became a Roman province. In the mid- 5th century, when it was overran by Vandals, before being recovered by Byzantines.