 Complete the following phrase:  In World War I, Italy completed the unification by acquiring Trento and Trieste, and gained a permanent seat in the League of Nationss executive council. Nevertheless, Italian nationalists considered World War I a mutilated victory because Italy did not have all the territories promised by the Treaty of London 1915 and that sentiment led to the rise of the fascist dictatorship of Benito Mussolini in 1922. The subsequent participation in World War II with the Axis powers, together with Nazi Germany and the Empire of Japan, ended in military defeat, Mussolinis arrest and escape aided by the German dictator Adolf Hitler, and an 