In 1935, De Bono became Supreme Commander of the Italian operation against Ethiopia during the Second Italo-Ethiopian War. De Bono was appointed because Mussolini wanted the victory in Ethiopia to be not just an Italian victory but also a fascist, hence the appointment of a well-known fascist general. In addition, he was Commander-in-Chief of the forces invading from Italian-held Eritrea on what was known as the "northern front". De Bono had under his direct command a force of nine army divisions in three corps: the Italian I Corps, the Italian II Corps and the Eritrean Corps.