Complex sentence: His legal reform, the Napoleonic Code, has been a major influence on many civil law jurisdictions worldwide, but he is best remembered for his role in the wars led against France by a series of coalitions, the so-called Napoleonic Wars.
Split into simpler sentences: His legal reform in France, the Napoleonic Code, has been a major influence on many civil law jurisdictions worldwide. Napoleon is best remembered for his role leading France against a series of coalitions, in the Napoleonic Wars.