Complex sentence: Casualties amounted to three thousand of king Dingane's soldiers dead, including two Zulu princes competing with prince Mpande for the Zulu throne, whilst three Trekker commando members were lightly wounded, including Pretorius himself.
Split into simpler sentences: Casualties amounted to three thousand of king Dingane's soldiers dead, including two Zulu princes competing with prince Mpande for the Zulu throne. Three Trekker commando members were lightly wounded, including Pretorius himself.