You mean Nazism. It didn't take all that much to defeat Italy. Funny that they use the term Fascists for Nazis, why is that? Could it be because "Nazi" was short for "National Socialist"? And of course that would be an admission that the Nazis were fellow socialists.
While the word fascist started as Mussolini’s movement, the word has come to have a broader meaning of totalitarianism and thus, in my mind, also encompasses nazi Germany and imperial Japan.