IOTL, the Expedition of The Thousand, spearheaded by Giuseppe Garibaldi, was a splendid success, despite the military superiority of the Two Sicilies' royalist armies. It could be said that Garibaldi's expedition was a risky gamble, and historians often compare it to Che and Castro's march through Cuba.
So, I ask: what if Garibaldi's expedition had failed (preferentially early on)?
What are the effects on the ongoing italian unification? Will the savoyards still attempt to attack Naples through the north? What happens to the Papal States?
With Italy broken in half, who will support whom? Will France continue supporting Sardinia-Piedmont?
In case the Austro-Prussian War still happens and Naples is allied to Austria, then could Sardinia-Piedmont end up allying with Prussia to attack the neapolitans?