Complex sentence: After Hamilcar's death (228 BC), Hasdrubal, who succeeded him in the command, extended the newly acquired empire by skillful diplomacy, and consolidated it by laying the foundation of Carthago Nova and establishing it as the capital of the new province.
Split into simpler sentences: After Hamilcar's death (228 BC), Hasdrubal succeeded him in the command and extended the newly acquired empire by skilful diplomacy. He consolidated it with the foundation of Carthago Nova, establishing it as the capital of the new province.