Ethiopian Empire
Italian invasion and World War II

In 1935 Italian soldiers, commanded by Marshal Emilio De Bono, invaded Ethiopia in what is known as the Second Italo-Ethiopian War. The war lasted seven months before an Italian victory was declared. The Ethiopian Empire was occupied into the Italian colony of Italian East Africa. The invasion was condemned by the League of Nations, though not much was done to end the hostility.

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 ".

On 10 June 1940, Italy declared war on the United Kingdom and France, as France was in the process of being conquered by Nazi Germany at the time and Benito Mussolini wished to expand Italy's colonial holdings. The Italian conquest of British Somaliland in August 1940 was successful, but the war turned against Italy afterward. Haile Selassie returned to Ethiopia from England to help rally the resistance. The British began their own invasion in January 1941 with the help of Ethiopian freedom fighters, and the last organized Italian resistance in Italian East Africa surrendered in November 1941, ending Italian rule.
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