From fragmented peninsula to a kingdom proclaimed in 1861
Italy had remained fragmented into competing states, kingdoms and papal territory since the fall of Rome, a division reinforced after the Congress of Vienna restored Austrian dominance over much of the peninsula in 1815. Unification proceeded through the Second Italian War of Independence in 1859, in which French-backed Sardinian forces defeated Austria and gained Lombardy, Giuseppe Garibaldi’s 1860 conquest of Sicily and Naples with a volunteer force known as the Thousand, and the proclamation of the Kingdom of Italy on 17 March 1861, with the process completed by Veneto’s acquisition in 1866 and the capture of Rome in 1870, which was designated the capital the following year.
Newspapers, treaties, and a novel read as national allegory
The documentary record for unification includes Cavour’s newspaper Il Risorgimento, through which he advocated Italian independence, Giuseppe Mazzini’s Young Italy society founded in 1831 with the motto Union, Strength and Freedom, and formal diplomatic instruments including the Armistice of Villafranca and the Plombieres Agreement between Cavour and Napoleon III. Alessandro Manzoni’s 1827 novel I Promessi Sposi is separately read by historians as a work of nationalist allegory, illustrating how cultural production supplemented direct political organising in building support for unification among literate audiences. The Treaty of Turin, signed in 1860, formally recorded Sardinia’s annexation of the central Italian duchies and papal territories seized earlier that year, giving the territorial gains achieved through war and popular uprising a further layer of documented diplomatic sanction.
Cavour’s diplomacy and Garibaldi’s Thousand
Camillo Cavour, as prime minister of Sardinia-Piedmont from 1852, pursued unification chiefly through diplomacy, securing French military support against Austria in exchange for ceding Nice and Savoy to France, while Giuseppe Garibaldi took a more directly military route, leading a volunteer force of roughly a thousand men, the Redshirts, in an 1860 campaign that conquered Sicily and Naples for the Kingdom of Sardinia. Garibaldi’s decision to hand his conquered territories to King Victor Emmanuel II rather than pursue his own earlier republican convictions proved decisive in allowing the monarchist and republican strands of the unification movement to combine into a single outcome rather than splitting into rival projects.
Republic or monarchy, and how much anyone outside the elite wanted either
Giuseppe Mazzini and Garibaldi initially advocated a republican, federal unification, a vision moderates including Cavour considered too radical, and the eventual outcome, a unified kingdom under the House of Savoy, represented the monarchist rather than the republican strand’s victory. The historical record itself notes that ordinary people across the peninsula at the time of unification spoke mutually unintelligible dialects and lacked what it describes as the least vestiges of national consciousness, indicating that unification was substantially an elite diplomatic and military achievement imposed on, rather than demanded by, much of the population it was carried out in the name of.
Rome in 1870, and unfinished business until the First World War
Rome remained outside the new kingdom until 1870, when Italian forces captured the city following France’s withdrawal of its garrison amid the Franco-Prussian War, and Rome was designated the kingdom’s capital in 1871, a step some historians treat as unification’s true completion rather than the earlier 1861 proclamation. Other historians extend the process further still, to the 1920 Treaty of Rapallo, which brought Trentino and Trieste into Italy after the First World War, reflecting genuinely unresolved irredentist claims to ethnically Italian territory that remained outside the kingdom’s borders for decades after 1861.
A unification worth reading for its gaps as much as its dates
Italian unification rewards attention for the gap it exposes between a clean official date, 17 March 1861, and the much messier underlying reality of elite-driven diplomacy, contested republican and monarchist visions, and a population that, by the historical record’s own account, largely lacked a shared sense of Italian identity at the moment its nation-state was proclaimed. Readers interested in nationalism as a constructed rather than simply discovered phenomenon will find unification a clear case study; readers interested in nineteenth-century diplomacy and military campaigning will find in Cavour’s calculated alliances and Garibaldi’s volunteer conquest two genuinely different paths to the same outcome.