|Battle of Custoza|
|Part of the Austro-Prussian War|
The charge of the 13th Regiment of Austrian Uhlans.
|Kingdom of Italy||Austrian Empire|
|Commanders and leaders|
Alfonso Ferrero la Marmora|
|Archduke Albert of Habsburg|
|Casualties and losses|
The Battle of Custoza took place on June 24, 1866 during the Third Italian War of Independence in the Italian unification process.
The Austrian Imperial army, joined by the Venetian Army, jointly commanded by Archduke Albert of Habsburg, decisively defeated the Italian army, led by Alfonso Ferrero la Marmora and Enrico Cialdini, despite the Italians' strong numerical advantage.
In June 1866, the German Kingdom of Prussia declared war on the Austrian Empire. The recently formed Kingdom of Italy decided to seize the opportunity and allied with Prussia with the intention of annexing Venetia and thus uniting the Italian Peninsula. The Italians rapidly built up a military force that was twice the size of their Austrian counterparts defending Venetia.
- Austrian South Army (Field Marschal Archduke Albrecht)
- V Corps (General Gabriel Freiherr von Rodich)
- Moering, Piret Brigades
- VII Corps (General Joseph Freiherr von Maroicic)
- Scudier, Töply, Welsersheimb Brigades
- IX Corps (General Ernst Ritter von Hartung)
- Böck, Kirchsberg, Weckbecker Brigades
- Reserve Division (General Friedrich Rupprecht)
- Two weak brigades
- Cavalry Division (General Ludwig Freiherr von Pulz)
- Italian Mincio Army (General Alfonso Ferrero La Marmora)
- I Corps (General Giovanni Durando)
- 1st, 2nd, 3rd and 5th Divisions
- III Corps (General Della Rocca)
- 7th, 8th, 9th and 16th Divisions. Also a Cavalry Division
In the fourth week of May, the Italians divided their forces into two armies: the 11 division strong Army of the Mincio led by Generals Alfonso Ferrero La Marmora and accompanied by King King Vittorio Emanuele II, and the 5 division strong Army of the Po, led by Enrico Cialdini. The Austrians, using the advantage of interior lines and the protection given by the Quadrilateral forts, concentrated against the Army of the Mincio and left a covering force against the Army of the Po.
The King's force was to move into the Trentino region, while La Marmora's crossed the Mincio River and invade Venetia. Meanwhile, the Austrian soldiers under Archduke Albert of Habsburg marched west from Verona to the north of the Italians, in an attempt to move behind the Italians so as to cut them off from the rear, and thus, slaughter them. At the start of June 24, 1866, La Marmora changed the direction of his front in order to march in to the same heights, the Austrians were trying to use as launching point for their attack. Instead of an enveloping battle, the two forces collided head on, with both headquarters trying to discover what happened in the heights near Villafranca
On the Austrian left, the Austrian cavalry attacked the Italian I Corps without orders at 7 AM. Although the attack was ineffectual and only crippled the Austrian cavalry, it created a panic in the Italian rear and immobilized three Italian divisions, who for the rest of the battle only took a defensive posture. During the morning isolated fights broke out in Oliosi, San Rocco, Custoza and San Giorgio between Rodic’s V Corps and Durando’s I Corps. After fierce fighting the division of Cerale was thrown out of Oliosi, broken and fled to the Mincio. Sirtori’s division was blocked from the Monte Vento by Rodic’s other troops and by 8AM, he was thrown back by fierce bayonet attacks. By 8:30 AM however, gaps were opening in the Austrian line. Brignone’s division had taken the Belvedere hill near Custoza after fighting with Hartung’s IX Corps. By 9 AM Hartung started launching attacks up the Monte Croce, trying to dislodge Brignone but by 10:00 AM the Austrians seemed spent. The Italians however neglected reinforcing Brignone, who was ultimately forced to leave the position after a counterattack, led by the King’s younger son Amadeo failed, with the prince being severely wounded .
La Marmora then ordered the divisions of Cugia and Govone up the heights to relieve Brignone. This forced the Austrian brigades of Böck and Scudier out of Custoza. Scudier then retired from the field, opening another gap in the Austrian line. On the Italian left Sirtori had managed to stabilize his front after Cerale’s flight. At this point in the battle, both sides were thinking they were facing a lost battle. By 1 PM La Marmora, deciding the battle was lost and wanting to secure his bridgeheads, ordered a retreat. Unbeknownst to La Marmora, Govone’s division had beaten back the VII Corps and captured the Belvedere. By 2 PM Rodic launched an attack on the Monte Vento and Santa Lucia. When Sirtori’s division gave way, a hole appeared in the Italian line, which the Austrians exploited. With Rodic on one flank and an Austrian brigade making for the bridge at Monzambano, Govone, who thought he had finally broken through the Austrian line, suddenly found himself isolated near Custoza. At this point, he was attacked in his other flank by Maroicic who without orders had committed the two Austrian reserve brigades to the fight. At the same time Hartung’s Corps was ordered to restart the fight, driving of the division of Cugia and capturing six guns and many prisoners on the top of the Monte Torre, which he had earlier failed to capture. After a bombardment of 40 Austrian guns, at 5 PM the Italians were driven out of Custoza by Maroicic.
The Austrians were victorious, both strategically and tactically. The Italians were driven back across the Mincio out of Venetia. It was, however, not a decisive defeat. To inflict a decisive defeat on the Italians, Albrecht's forces needed to drive southwest to seize the bridges across the Mincio (which the Italians had neglected to fortify). Such a pursuit would have trapped the disbanded remnants of the two Italian corps on the east bank of the river and would have enabled Albert to invade the Kingdom of Italy itself.
Instead, Albert did not order a pursuit because he thought the Austrians were too exhausted and the Austrian cavalry had been mauled by frivolous attacks in the morning, squandering the possibility to the destroy the demoralized Army of the Mincio. On June 26, 1866, Albert shifted his headquarters back to Verona, because he was concerned about a possible French reply to an Austrian invasion of Lombardy. He should not have been: even the Emperor advised Albrecht to ignore all political considerations.
After their loss at Königgratz (July 3), the Austrians were forced to transfer one corps from South Army to Austria to cover Vienna, weakening their foces in the Veneto. The Italians, however, resumed their offensive only in mid-July. Cialdini crossed the Po and occupied Rovigo (July 11), Padua (July 12), Treviso (July 14), San Donà di Piave (July 18), Valdobbiadene and Oderzo (July 20), Vicenza (July 21) and finally Udine, in Friuli (July 22). In the meantime Garibaldi's volunteers had pushed forward from Brescia towards Trento (see Invasion of Trentino) fighting victoriously at the battle of Bezzecca of July 21.
Despite the victory at Custoza and a naval defeat of the Italians at Lissa, due to Königgrätz the Austrians were forced to surrender to the Prussians and were forced to cede Venetia.
- Only 65,000 of which crossed the Mincio.
- II Corps, with its 6th, 10th and 19th Divisions, did not engage in the battle. Wavro pp. 96-116
- Wawro, pp. 100-103.
- Wawro, pp. 104-107.
- Wawro, pp. 107-109.
- Wawro, pp. 109-111.
- Wawro, pp. 111-112.
- Wawro, pp. 114-116.
- Wawro, pp. 116-120.
- "Details on Custozza - from the Clash of Steel online battle database". clash-of-steel.co.uk. 2012 [last update]. http://www.clash-of-steel.co.uk/conflicts/details.php?entry=CUSTOZZA01. Retrieved July 16, 2012.
- Encyclopædia Britannica: Second Battle of Custoza
- Geoffrey Wawro, The Austro-Prussian War. Austria's war with Prussia and Italy in 1866 (New York 2007)
- Frederick Engels. Notes on the War in Germany No. III, The Manchester Guardian, No. 6197, June 28, 1866. A contemporary news paper article.
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