Complex sentence: Thus Hasdrubal was left alone in facing Scipio's concentrated force, but the Carthaginian general was able to avoid battle by splitting his troops among fortified cities, and so the campaign of 207 BC in Spain was ended without any further major action.
Split into simpler sentences: Thus Hasdrubal was left alone in facing Scipio's concentrated force, but the Carthaginian general was able to avoid battle by splitting his troops among fortified cities. The campaign of 207 BC in Spain was ended without any further major action.