As we all know, Italy has always been a politically fractious region. There's a reason why the region is known as a 'Basket of Snakes'.
However, in the Chaos of 1807, and even later, during the 1865 Revolutions, there were always optimistic politicians or radical partisans who strive to unite the peninsula. Of course, they were always obliterated by the forces at large, and some Italians, specifically the Venetian and Papals, voiced doubt about such a concept, but the idea remains quite interesting.
Is there any way to make the Pan-Italianists succeed in creating a singular Italy, or even a decentralized union akin to the Holy German Empire?