Complex sentence: Timoleon, however, quickly followed, and laid siege to Messana both by sea and land, whereupon Hippon took to flight, and Mamercus surrendered to the Corinthian general, stipulating only for a regular trial before the Syracusans.
Split into simpler sentences: Timoleon, however, quickly followed him and laid siege to Messana, both by sea and land, forcing Hippon to flee. Mamercus then surrendered to Timoleon, stipulating only for a regular trial before the Syracusans.