Italian East Africa Ababa, to proclaim an empire by May 1936, making Ethiopia part of Italian East Africa. The Italian victory in the war coincided with the zenith of the international popularity of dictator Benito Mussolini's Fascist regime, during which colonialist leaders praised Mussolini for his actions. Mussolini's international popularity decreased as he endorsed the annexation of Austria by Nazi Germany, beginning a political tilt toward Germany that eventually led to the downfall of Mussolini and the Fascist regime in Italy in World War II. On 10 June 1940, Italy declared war on Britain and France, which made Italian military forces in Libya
Italian East Africa answerable to a viceroy, who in turn represented the Emperor. Italian East Africa was briefly enlarged in 1940, as Italian forces conquered British Somaliland, thereby bringing all Somali territories under Italian administration. However, the enlarged colony was dismembered only a year later, when in the course of the East African Campaign the colony was occupied by British forces. Italian East Africa, in Italian "Africa Orientale Italiana", was acronymed in official documents as "AOI". The dominion was formed in 1936, after the Second Italo-Abyssinian War that resulted in the annexation of the Ethiopian Empire by Fascist Italy, by merging the pre-existing