Italy's invasion of Ethiopia in 1935 marked a turning point in interwar Europe. The last great European colonial conquest in Africa, the conflict represented an enormous gamble for the Fascist dictator Benito Mussolini. He faced a challenge not only from a stout Ethiopian defence, but also from difficult logistics made worse by the League of Nations' half-hearted sanctions. Mussolini faced down this opposition, and Italian troops, aided by air superiority and liberal use of yprite gas, conquered Addis Ababa within eight months, a victory that shocked many military observers of the time with...