The new Kingdom of Italy was created in 1861 under the Savoy monarchy. In 1862, Mazzini joined Garibaldi in his failed attempt to free Rome. In 1866, Italy joined the Austro-Prussian War and gained Venetia. At this time, Mazzini frequently spoke out against how the unification of his country was being achieved. In 1867, he refused a seat in the Italian Chamber of Deputies. In 1870, he tried to start a rebellion in Sicily and was arrested and imprisoned in Gaeta. In October, he was freed in the amnesty declared after the Kingdom finally took Rome and returned to London in mid-December.