By this movement Vercelli was abandoned by the Austrians and it was immediately reoccupied by the Sardinians.
Napoleon now prepared a bold flank movement, by leaving the Po for the Ticino, and to mask this manoeuvre ordered the Sardinians to make an advance. Thus, while Victor Emmanuel, at the head of his men, flung himself from Vercelli on Palestro—meriting, by the skill of his military tactics, the acclamations of a regiment of zouaves whom he headed as corporal—the French, taking ad vantage of the Alessandria, Casale, and Novara Railway, made for the bridge of Buffalora over the Ticino. Only then did Gyulai perceive this clever stratagem which threw Lombardy open to the allies, and he was consequently obliged to cross the Ticino to block the enemy's way to Milan.
On June 4th, at Magenta, nearly the whole of the Austrian army engaged the French forces; the battle, which was most desperate, lasted all day, and was remarkable for the prodigies of valor performed. The Austrians, driven back into Magenta itself, maintained, even in that village, such a stout resistance that they had to be dislodged by house-to-house fighting.
On June 8th Victor Emmanuel and Napoleon III made their triumphal entry into Milan—now freed from the Austrian yoke. On the same day a French corps repulsed the Austrians at Melegnano, while Garibaldi entered Bergamo from the other side. Garibaldi, who had been the last to leave Lombardy in 1848, was now the first to set foot in its territory in 1859. Since May 23d he had led his own Cacciatori to the Lombard shores of Lake Maggiore, had defeated the Austrians at Varese, entered Como, routed the enemy afresh at San Fermo, and was now proceeding to Bergamo and Brescia, with the intention of reaching the Trentine Alps, to cut off the enemy's retreat.
After the Battle of Magenta, Gyulai had been dismissed from the command, and his post was assumed by the Emperor Francis Joseph himself, assisted by the aged Marshal Hess. On the night of June 23d the retreating Austrians crossed the Mincio, but a few hours after retraced their steps and took up their position on the hills to the south of the Lake of Garda. On the morning of the 24th the Franco-Sardinian army began their march at dawn, and shortly afterward, to their great amazement, encountered the Austrians, who they imagined had crossed the Mincio the night before. The struggle was terrible; in fact, the line covered by the fighting extended a distance of five leagues.
A series of hills, dominated by Solferino and San Martino, formed the positions the Franco-Sardinian army had to assail. The French contested Solferino with the Austrians, and, after a hotly disputed battle of more than twelve hours, succeeded in occupying it. The Sardinians, led by Victor Emmanuel, made a violent assault on San Martino; four times in succession did they take it, only to lose it again, but the fifth time they made themselves masters of it for good and all. By six o'clock in the evening the strength of the Austrian army was everywhere broken. Just then a frightful hurricane, heralded by clouds of dust and accompanied by torrents of rain, burst over the two armies and thus favored the flight of the Austrian battalions. Napoleon III now fixed his headquarters at Cavriana, in the same house that Francis Joseph had tenanted during the action. On that vast battlefield the combatants had numbered three hundred thousand men—one hundred sixty thousand Austrians and one hundred forty thousand French and Sardinians—of all these, after that sanguinary struggle, twenty-five thousand were left dead or wounded.
After a few days' rest the Franco-Sardinian army crossed the Mincio and besieged Peschiera. Now there seemed a chance of the Italians fulfilling the hope they had so long cherished, of expelling the foreigners. They confidently awaited news of fresh feats of arms in the Quadrilateral and of the success of the fleet sent by France and Sardinia into Adriatic waters, but instead came the most unexpected tidings imaginable.
On July 8th Napoleon III had met Francis Joseph, and three days later the preliminaries of peace were signed at Villafranca. By this treaty Austria was to cede Lombardy to Napoleon, who was to relegate it to Sardinia; the Italian States were to be amalgamated into a confederation, under the Presidency of the Pope, but Venice, though forming part of this same confederation, was to remain under Austrian rule. Great indeed was the mortification of all Italy on hearing such terms of peace announced. Cavour, who had devoted all his marvellous talents to realizing the ideal of national redemption and had believed his ends so nearly attained, hastened to his Prince, and, in a melancholy interview, advised him not to accept such conditions. But Victor Emmanuel, although it caused his very heart to bleed, signed the treaty, adding these words: "I approve as far as I myself am concerned," whereupon Cavour sent in his resignation.
What was the motive that had induced Napoleon to break his lately made promise of freeing Italy from the Alps to the Adriatic? There were many reasons which influenced him: the sight of that immense battlefield, strewn with the bodies of the slain, the determined resistance of the Austrian soldiers, the difficulties which would have to be faced in the Quadrilateral, the hostile attitude of Prussia, were all motives which combined to sway the French Emperor's mind. But there was also another reason which counted for much. Napoleon had been drawn into this campaign without really knowing the state of Italian public opinion; he wished Italy to be free "from the Alps to the Adriatic," but did not want Italian unity; rather did he desire the formation of a confederacy wherein France could always make her own predominance felt in the peninsula. Scarcely had he arrived in Italy when he was forced to see that Italian ideals were very different from what he had imagined them to be. Trials had but ripened the virtues of prudence and wisdom in men's minds: in 1859 the people were little likely to repeat the blunders of 1848 or 1849, and there were now no longer discussions over forms of government, but everywhere a unanimous resolve to rally round the liberal monarchy of Savoy.
On the first proclamation of the war the Grand Duke of Tuscany had been compelled to fly from his States (April 27th). Napoleon had imagined that in this Province—the ancient stronghold of Italian municipalism—it would be easy to form a new kingdom with a Bonaparte to wear its crown. With this aim in view the fifth French army corps, commanded by Prince Jerome Napoleon, had debarked at Leghorn, under the pretext of organizing the military forces of Central Italy and harassing the Austrians on the extreme left. But the Tuscans soon divined the real intention of the French, and the Provisional Government in Florence, previously instituted under Bettino Ricasoli, suddenly avowed its intention of uniting Tuscany to Sardinia, whereupon Prince Napoleon, seeing the true attitude of the country, found it advisable to affect to promote the annexation.