The great war was meanwhile approaching its climax. After Montebello the whole French army executed a secret flank movement, changing its position from Voghera, where Gyulai believed it to be, and whence he expected it to move on to Piacenza, to the line of the Sesia, between Cameriano and Casale. To mask the main operations, the Sardinian forces were sent to Palestro, on the other side of the Sesia. On the 30th of May, they drove in the outposts of the enemy, and on the 31st fought the important engagement by which the Austrian attempt to retake Palestro was repelled, and great damage caused to Zobel’s corps, which was obliged to leave eight guns sticking in the mud. The French Zouaves of the 3rd regiment fought with the Piedmontese, and made the battle famous by the reckless valour of their bayonet charges. Victor Emmanuel, deaf to all remonstrances, placed himself at their head, in consequence of which they elected him their corporal, an honour once paid to the first Napoleon.
There is reason to think that after Palestro, Gyulai, having at last realised what Napoleon was about, wished to evacuate Lombardy, but was prevented from doing so by strong protests sent by the Emperor Francis Joseph, who was at Verona. The Austrian army was in full retreat when it was pulled up near Magenta, with the object of checking the advance of the French, who had already begun to cross the Ticino by the bridges of San Martino and Buffalora, which the Austrians had tried to blow up, but had not succeeded from want of proper powder. In the great battle of the 4th of June, Austrians and French numbered respectively about 60,000 men; no Piedmontese were engaged till the evening, when a battalion of Bersaglieri arrived. The Imperial Guard, with which was Napoleon, had to bear the brunt of the fight for four hours, and ran a good chance of being annihilated; not a brilliant proof of French generalship, but happily the Austrians also committed grave mistakes. MacMahon’s arrival at five in the afternoon prevented a catastrophe, and the fighting, which continued far into the night, was from this moment attended by results on the whole advantageous to the French. Not much more can be said. Magenta was very like a drawn battle. The Austrians are calculated to have lost 10,000 men, the French between 4,000 and 5,000. It was expected that the Austrians would renew the attack, but on the 5th, Gyulai ordered the retreat, which was the last order he had the opportunity of giving, as he was deprived of his command immediately after.
At mid-day on the 5th, Milan, which was trembling on the verge of revolution, made the pleasurable discovery that there were no Austrians left in the town. The municipality sent out delegates with the keys of the city to Victor Emmanuel. At ten a.m. on the 7th, MacMahon’s corps began to file down the streets. Words cannot describe the welcome given to them. How MacMahon lifted to his saddle-bow a child that was in danger of being crushed by the