England confined herself to expressions of sympathy, but Louis Napoleon, now Emperor of France, seemed likely to become an ally. He met Cavour at Plombières, a watering place in the Vosges, in July 1858, and entered into a formal compact to expel the Austrians from Italy. The final arrangements were made in the following spring in Paris. "It is done," said Cavour, the minister triumphant. "We have made some history, and now to dinner."
Mazzini, in England, read of the alliance with gloomy misgivings, for, as a Republican, he distrusted the President of France who had made himself an Emperor. He said that Napoleon III would work now for his own ends. He protested in vain. Garibaldi rejoiced and returned from Caprera, where he had been trying to plant a garden on a barren island.
Cavour fought against some prejudice when he offered to enrol Garibaldi and his followers in the army of Sardinia. Charles Albert had refused the hero's sword in the days of his bitter struggle, and the regular officers still looked askance on the Revolutionary captain.
But the Austrian troops were countless, numbering recruits from the Tyrol and Bohemia, from the valleys of Styria and the Hungarian steppes. There was need of a vast army to oppose them. The French soldiers fought gallantly, yet they were inferior to the Austrians in discipline. When the allies had won the hard contested fight of Montebello it was good to think of that band of 3000, singing as they marched, "Addio mia bella, addio," like the knights of legend. They crossed Lake Maggiore into the enemy's own country, and took all the district of the Lowland Lakes.
In June, the allies won the victory of Magenta, and on the 8th of that month, King and Emperor entered Milan flushed with victory. The Austrians had fled, and the keys of the city were in the possession of Victor Emmanuel.
The Emperor of Austria, Francis Joseph, had assumed command of the army when the great battle of Solferino was fought amidst the wondrous beauty of Italian scenery in an Italian summer. It was June 24th, and the peasant reaped the harvest of Lombardy, wondering if he should reap for the conqueror the next day. The French officers won great glory as they charged up the hills, which must be taken before they could succeed in storming Solferino. After a fierce struggle of six hours, the streets of the little town were filled with the bodies of the dead and dying. By the evening, the victory of the allies over Austria was certain.
Napoleon III had kept his promise to the Italian people, who were encouraged by a success of the Piedmontese army under Victor Emmanuel at San Martino. But he disappointed them cruelly by stopping short in his victorious career and sending General Fleury to the Austrian camp to demand an armistice. Europe was amazed when the preliminaries of peace were signed, for it was generally expected that Austria would be brought to submission. Italy was in despair, for Venetia had not yet been won for them.
Cavour raged with fury, regretting that he had trusted Napoleon and trusted his King, Victor Emmanuel, who agreed to the proposals for an armistice. Now he heaped them with reproaches because they had given up the Italian cause. He resigned office in bitterness for it was he who had concluded the alliance of France and Italy.
Napoleon returned to France, pursued by the indignation of the country he had come to deliver. He complained of their ingratitude, though he might have known that Lombardy would not accept freedom at the cost of Venice. He was execrated when the price of his assistance was demanded. France claimed Nice and Savoy as French provinces henceforth. Savoy was the country of Victor Emmanuel, and Nice the honoured birthplace of the idolized Garibaldi!
Garibaldi was chosen by the people of Nice for the new Chamber of 1860, for they hoped that he would make an effort to save his native town. He had some idea of raising a revolution against French rule, but decided to free Sicily as a mightier enterprise. Victor Emmanuel completed the sacrifice which gave "the cradle of his race" to the foreigner. He was reconciled to the cession at length because he believed that Italy had gained much already.