The Expedition of the Thousand was an event in the unification of what country?

The Expedition of the Thousand (Italian Spedizione dei Mille) was an event of the Italian Risorgimento that took place in 1860. A corps of volunteers led by Giuseppe Garibaldi landed in Sicily in order to conquer the Kingdom of the Two Sicilies, ruled by the Bourbons.

The project was an ambitious and risky venture aiming to conquer, with a thousand men, a kingdom with a larger regular army and a more powerful navy. The expedition was a success and concluded with a plebiscite that brought Naples and Sicily into the Kingdom of Sardinia, the last territorial conquest before the creation of the Kingdom of Italy on 17 March 1861.

The sea venture was the only desired action that was jointly decided by the "four fathers of the nation" Giuseppe Mazzini, Giuseppe Garibaldi, Victor Emmanuel II, and Camillo Cavour, pursuing divergent goals. However, the Expedition was instigated by Francesco Crispi, who utilized his political influence to bolster the Italian unification project.

The various groups participated in the expedition for a variety of reasons: for Garibaldi, it was to achieve a united Italy; to the Sicilian bourgeoisie, an independent Sicily as part of the kingdom of Italy, and for the mass farmers, land distribution and the end of oppression.