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
Italian East Africa (Citao)" (Mechanic & Transport industry). Italians even created new airports and in 1936 started the worldwide famous "Linea dell'Impero", a flight connecting Addis Abeba to Rome. The line was opened after the Italian conquest of Ethiopia and was followed by the first air links with the Italian colonies in Africa Orientale Italiana (Italian East Africa), which began in a pioneering way since 1934. The route was enlarged to 6,379 km and initially joined Rome with Addis Ababa via Syracuse, Benghazi, Cairo, Wadi Halfa, Khartoum, Kassala, Asmara, Dire Dawa. There was a change of aircraft in Benghazi (or sometimes in Tripoli).