Siege of Saïo the Italian dictator, Benito Mussolini, proclaimed the colony of "Africa Orientale Italiana" (AOI, Italian East Africa), formed from Ethiopia (after the Italian victory in the Second Italo-Ethiopian War, fought 3 October 1935 – May 1936) and the existing Italian possessions of Italian Eritrea and Italian Somaliland. On 10 June 1940, Mussolini declared war on Britain and France, which made Italian military forces in Libya a threat to Egypt and those in Italian East Africa a danger to the British and French colonies in East Africa. Italian belligerence also closed the Mediterranean to Allied merchant ships and endangered British supply routes
African independence movements which the Eritrean people overwhelmingly, 99.8%, voted for independence, Eritrea officially declared its independence and gained international recognition. At the onset of World War I, the Union of South Africa participated in the invasion and occupation of several Allied territories taken from the German Empire, most notably German South-West Africa and German East Africa (Tanzania). Germany's defeat forced the new Weimar Republic to cede its overseas possessions to the League of Nations as mandates. A mandate over South-West Africa was conferred upon the United Kingdom, "for and on behalf of the government of the Union of South Africa", which was