Garibaldi was not long contented with his retirement at Caprera. In July, 1862, he rallied around him a number of followers, determined to force the king's hand, and to complete the work of unity by advancing on Rome as he had on Naples. His rashness was opposed by the Italian government,--wisely awaiting riper opportunity,--who sent against him the greatest general of Italy (La Marmora), and Garibaldi was taken prisoner at Aspromonte. The king determined to do nothing further without the support of the representatives of the nation, but found it necessary to maintain a large army, which involved increased taxation,--to which, however, the Italians generously submitted. In 1866, while Austria was embroiled with Prussia, Victor Emmanuel, having formed an alliance with the Northern Powers, invaded Venetia; and in the settlement between the two German Powers the Venetian province fell to the King of Italy. In 1867 Garibaldi made another attempt on Rome, but was arrested near Lake Thrasimene and sent back to Caprera. Again he left his island, landed on the Tuscan coast, and advanced to Rome with his body of volunteers, and was again defeated and sent back to Caprera. The government dealt mildly with this prince of filibusters, in view of his past services and his unquestioned patriotism. His errors were those of the head and not of the heart. He was too impulsive, too impatient, and too rash in his schemes for Italian liberty. It was not until Louis Napoleon was defeated at Sedan that the French troops were withdrawn from Rome, and the way was finally opened for the occupation of the city by the troops of Victor Emmanuel in 1870. A Roman plebiscite had voted for the union of all Italy under the constitutional rule of the House of Savoy. From 1859 to 1865 the capital of the kingdom had been Turin, the principal city of Piedmont; with the enlargement of the realm the latter year saw the court removed to Florence, in Tuscany; but now that all the States were united under one rule, Rome once again, after long centuries had passed, became the capital of Italy, and the temporal power of the Pope passed away forever.