The Italian city-states were unified into the modern country of Italy in what year?

In 1860–1861, Garibaldi led the drive for unification in Naples and Sicily (the Expedition of the Thousand), while the House of Savoy troops occupied the central territories of the Italian peninsula, except Rome and part of Papal States. Teano was the site of the famous meeting of 26 October 1860 between Giuseppe Garibaldi and Victor Emmanuel II, last King of Sardinia, in which Garibaldi shook Victor Emanuel's hand and hailed him as King of Italy; thus, Garibaldi sacrificed republican hopes for the sake of Italian unity under a monarchy. Cavour agreed to include Garibaldi's Southern Italy allowing it to join the union with the Kingdom of Sardinia in 1860. This allowed the Sardinian government to declare a united Italian kingdom on 17 March 1861. Victor Emmanuel II then became the first king of a united Italy, and the capital was moved from Turin to Florence.