Complex sentence: The Romans supported Masinissa's claim to the Numidian throne against Syphax, who was nevertheless successful in driving Masinissa from power until Scipio invaded Africa in 204.
Split into simpler sentences: The Romans supported Masinissa's claim to the Numidian throne against Syphax. Syphax was successful in driving Masinissa from power until Scipio invaded Africa in 204.