In 1859, during the
Second Italian War of Independence, much of the Papal States had been conquered by the
Kingdom of Sardinia under
Victor Emmanuel II. The next year,
Giuseppe Garibaldi's
Expedition of the Thousand resulted in the annexation of the
Kingdom of the Two Sicilies by Sardinia, leading to the
proclamation of the Kingdom of Italy on 17 March 1861. The new state had not yet incorporated Rome and the surrounding region of
Lazio, which remained part of the Papal States, and
Veneto, which was ruled by
Austria as a
crown land and would only be
annexed in 1866, after the
Third Italian War of Independence. The first
Prime Minister of Italy,
Camillo Benso, Count of Cavour, died soon after the proclamation of Italian national unity, leaving to his successors to solve the knotty Venetian and Roman problems. Cavour had firmly believed that without Rome as the capital, Italy's unification would be incomplete. "To go to Rome", said his successor,
Bettino Ricasoli, "is not merely a right; it is an inexorable necessity." In regard to the future relations between church and state, Cavour's famous dictum was, "A free Church in a free State"; by which he meant that the former should be entirely free to exercise her spiritual powers and leave politics entirely to the latter. On 27 March 1861, the new
Italian Parliament met in
Turin and declared Rome the capital of Italy. However, the Italian government could not take its seat in Rome because it did not control the territory. Also, a French garrison was maintained in the city by Emperor
Napoleon III in support of Pope Pius IX, who was determined not to hand over temporal power in the State of the Church.
Franco-Prussian War On 13 and 18 July 1870, in the last months of the papacy's rule over Rome, the
First Vatican Council which had begun in 1869 affirmed the doctrine of
papal infallibility. Then, bishops left Rome due to opposition stance, or for a summer break. The First Vatican Council never reconvened, and was formally closed only in 1960. Also in July 1870,
France declared war on Prussia, and by early August, Napoleon III recalled his garrison from Rome. The French not only needed the troops to defend their homeland, but were concerned that Italy might use the French presence in Rome as a pretext to join the war against France. Already in 1866, after the
Austro-Prussian War had begun in June, Italy took advantage and
attacked Austria to gain territory, and thus allied with
Prussia. With Papal Rome still guarded by French forces, Italian public opinion again favored the Prussian side at the start of the Franco-Prussian War. The removal of the French garrison allowed Italy to remain neutral and eased tensions between France and Italy. It was only after the surrender of Napoleon III and his army at the
Battle of Sedan on 2 September that the situation changed radically. The French Emperor was captured and deposed. The best French units had been captured by the Prussians, who quickly followed up their success at Sedan by
marching on Paris. Faced with a pressing need to defend the capital with its remaining forces, the
provisional government of the newly proclaimed
French Republic was clearly not in a military position to retaliate against Italy. In any case, the republican government was far less sympathetic to the Holy See than the Empire and did not possess the political will to protect the pope's position. == Prelude ==