Well... you might be able to do that in the next game if this one goes well enough. This game will focus on the Eastern Front and the game will end when either the Nazi's are pushed out of Russia, or when Russia eventually surrenders. Then we'll focus on things such as replacing Mussolini.

With that said, I do like the fact that you have such a high goal, but why not replace Hitler? Why settle for Mussolini and his weak country when you can have Nazi Germany and Italy might?