How united was Italy after 1861?

Venetia and Rome still unacquired:

• Venetia wasn't annexed until the Austro-Prussian 1866 war
• Napoleon III used careful and clever planning to gain the state of Venetia;
  - he met with Bismarck in 1865 at Biarritz and said he would remain neutral in an up-and-coming war with Austria in return for Venice
  - at the same time he thought the best situation would be no-lose one so Napoleon also met with Austria
  - he declared that he would remain neutral in a possible war, so long as France gain Venetia for doing so
• finally at the Treaty of Prague in August 1866, Venetia was handed over to France to pass onto Italy
• Rome was acquired in similar circumstances but this time, Bismarck had provoked a war with France
• it was 1870, Bismarck had done several things to get Napoleon angry enough to declared war with Prussia
• meanwhile, because the French army were outnumbered quite a lot, the 20,000 French troops that were occupying Rome had to leave and join in the war
• at this point, Rome was left undefended so the Prime Minister of Italy…