During the conflict, both Ethiopian and Italian troops committed war crimes. Ethiopian troops are known to have made use of Dum-Dum bullets (in violation of the Hague Conventions) and mutilated captured soldiers (often with castration). Italian troops used sulfur mustard in chemical warfare, ignoring the Geneva Protocol that it had signed seven years earlier. The Italian military dropped mustard gas in bombs, sprayed it from airplanes and spread it in powdered form on the ground. 150,000 chemical casualties were reported, mostly from mustard gas. In the aftermath of the war Italy annexed Ethiopia, uniting it with Italy's other colonies in eastern Africa to form the new colony of Italian East Africa, and Victor Emmanuel III of Italy adopted the title "Emperor of Abyssinia".