The plan adopted by La Marmora is vaguely said to have been that which was prepared by the French and Sardinian staffs for use in 1859, had [Pg.366] the war been continued. But in what it really consisted is not to this day placed beyond dispute. The army, roughly speaking, was divided into halves; one (the larger) half under the King and La Marmora was to operate on the Mincio; the other, under Cialdini, was to operate on the lower Po. It is supposed that one of these portions was intended to act as a blind to deceive the enemy as to the movements of the other portion; the undecided question is, which was meant to be the principal and which the accessory?
The volunteers were thrown against the precipices of the Tridentine mountains, where a detachment of the regular army, well-armed and properly supplied with artillery, would have been better suited for the work. The Garibaldian headquarters was at Salò on the Lake of Garda. Less than half of the 35,000 volunteers who appear upon paper, were ever ready to be sent to the front. It was widely said that only patriotism prevented Garibaldi from throwing up his command, so dissatisfied was he with the conduct of affairs.
Prussia invaded Hanover and Saxony on the 16th of June, and declared war with Austria on the 21st, one day after the Italian declaration of war had been delivered to the Archduke Albrecht. On the 23rd La Marmora's army began to cross the Mincio. It consisted of three corps d'armée under the command of Generals Durando, Cucchiari and Delia Rocca, each corps containing four divisions. The force under Cialdini was composed of eight divisions forming one corps d'armée. An Italian military writer rates the numbers at 133,000 and 82,000 respectively. La Marmora acquired the belief that the Archduke's attention was absorbed by Cialdini's movements on the Po, and that his [ [Pg.367] own operations on the Mincio would pass unobserved.
While the Italian commander had no information of what was going on in the enemy's camp, the Archduke's intelligence department was so efficient that he knew quite well the disposition of both Italian armies. Cialdini's advance, if he meant to advance, was checked by floods. On the night of the 23rd most of La Marmora's force bivouacked on the left (Venetian) bank of the Mincio. No reconnaissances were made; everyone supposed that the Austrians were still beyond the Adige, and that they intended to stay there. The King slept at Goito.
Before the early dawn next morning the whole Italian army of the Mincio had orders to advance. The soldiers marched with heavy knapsacks and empty stomachs, and with no more precautions than in time of peace. The Austrian Archduke was in the saddle at four a.m., and watched from an eminence the moving clouds of dust which announced the approach of his unsuspecting foe.
La Marmora's intention had been to occupy the heights of Santa Giustina, Sona and Somma Campagna, but the Archduke anticipated his design, and while the Italians were moving from the Mincio, the Austrians were ranging themselves in those positions. At half-past five on the midsummer Sunday morning, the Austrian advance guard led by Colonel Pulz came up with Prince Humbert's division near Villafranca. The battle began dramatically, with a charge of the splendid Polish and Hungarian Hussars, who dashed their horses against the Italian squares, in one of which, opportunely formed for his shelter, was the gallant heir to the throne. Bixio's division was also engaged in this prelude, which augured not ill for the Italians, since at about eight o'clock Pulz received the Archduke's orders to retire.
[ [Pg.368] The first hours of the battle were spent in fortuitous encounters along the extensive chain of hillocks which La Marmora had intended to occupy. As the Italians approached each position they found it in the possession of a strong force of the enemy. On the right, however, Custoza and the heights between it and Somma Campagna had not been occupied by the Austrians. Here La Marmora placed the flower of his army, the Sardinian and Lombard Grenadiers, the latter commanded by Prince Amedeo. The fighting continued through the day over very widely distributed ground, but from about nine in the morning the supreme interest was concentrated at and near Custoza, in which the Archduke promptly detected the turning-point of the battle. To wrest Custoza from the hold of the Italians was to the Austrians on the 24th of June 1866, what the taking of the crest of Solferino had been to the French on the 24th of June 1859. La Marmora in person led the Grenadiers into action; they proved worthy of their reputation, but after losing a great many men, Prince Amedeo being among the wounded, they were obliged to retreat. At about midday, however, the Italian prospects improved so much that in the opinion of Austrian military writers, with moderate reinforcements they would have had a strong probability of winning the battle. La Marmora saw the importance of getting fresh troops into the field, but, instead of sending for the divisions under Bixio and Prince Humbert, which since eight a.m. had been fretting in inaction close by, at Villafranca, he rode himself to Goito, a great distance away, to look after the reserves belonging to the 2nd corps d'armée; a task which any staff officer could have performed as well. This inexplicable proceeding left the army without a commander-in-chief. The generals of division followed their [ [Pg.369] individual inspirations, Govone, Pianel and Cugia especially distinguishing themselves: it is sad to think that death has removed these three officers from the Italian ranks. But the Austrians fatally gained ground, and as the afternoon closed in the Archduke began to feel sure that the Italian reinforcements whose arrival he had so much feared, were never coming. He therefore prepared for the final effort which was to give him the well-deserved honours of the day. Towards seven o'clock in the evening, his soldiers succeeded in storming the heights of Custoza, and Austria could write a second battle of that name among her victories.
The Italians lost 720 killed, 3112 wounded and 3608 prisoners. The Austrian loss was 960 killed, 3690 wounded and 1000 prisoners. Both sides were much tried by the scorching midsummer sun, but the Italians laboured under the additional drawback of having to fight fasting. In his report, the Archduke Albrecht mentioned that the prisoners said they had not tasted food for twenty-four hours. In the same report, he did ample justice to the courage of the Italian soldiers.
As has been stated, the Archduke fought Custoza with not less, probably with rather more, than 70,000 men. The force which La Marmora placed in the field was actually inferior in number. The divisions of Bixio and Prince Humbert were kept doing nothing all day at a stone's throw from the scene of action. Of the whole 2nd corps d'armée only a trifling detachment ever reached the ground. Inexplicably little use was made of the Italian cavalry.
This bungling had lost the battle, but the fact that on the morrow, six divisions of the army of the Mincio were practically fresh, might have suggested to a general of enterprise to try again, since it was known that the Archduke had not a single new man to fall back on. And [Pg.370] there was Cialdini on the Po with his eight divisions that had not been engaged at all. But, instead of adopting a spirited course, the Italian authorities gave way to unreasoning panic. It appears, unfortunately, that the King was the first to be overcome by this moral vertigo. The long and fiercely discussed question of who telegraphed to Cialdini: 'Irreparable disaster; cover the capital,' seems to have been settled since that general's death in 1892. It is now alleged that the telegram, the authorship of which was disowned by La Marmora, was signed by the King's adjutant, Count Verasio di Castiglione. Cialdini obeyed the order and fell back on Modena. Whether he was bound to obey an almost anonymous communication signed by an irresponsible officer is a moot point; it is reported that he repented having done so to the last day of his life.