Why was itallian unification still incomplete in 1870?

Italian unification was still incomplete in 1870 primarily because the Papal States remained under the control of the Pope, who opposed the unification movement. While most of Italy had been unified through various wars and diplomatic efforts, Rome was not incorporated until the Franco-Prussian War diverted French troops, allowing Italian forces to capture the city. Additionally, regional differences and political factions persisted, complicating the establishment of a fully cohesive Italian state. Thus, it wasn't until the capture of Rome that unification could be considered complete.