[1][2] During World War II, the regiment was assigned to the 15th Infantry Division "Bergamo", with which it fought in the Invasion of Yugoslavia.

[1] In 1975, the regiment's flag and traditions were assigned to the 26th Infantry Battalion "Bergamo", which trained recruits destined for the Armored Division "Centauro".

On 1 November 1859, the Royal Sardinian Army formed eight new infantry regiments to garrison the occupied territories.

On 5 May 1860, Giuseppe Garibaldi's Expedition of the Thousand set off, with the support of the Sardinian government, from Genoa and landed on 11 May in Marsala in Sicily.

On 15 May 1860, Garibaldi won the Battle of Calatafimi and the Sardinian government decided to send reinforcements to Sicily.

For their conduct during the Siege of Gaeta, the two regiments of the Brigade "Bergamo" were both awarded a Silver Medal of Military Valor.

In 1895–96, the regiment provided ten officers and 270 enlisted for units deployed to Italian Eritrea for the First Italo-Ethiopian War.

At the time the 26th Infantry Regiment consisted of three battalions, each of which fielded four fusilier companies and one machine gun section.

On 10 November 1915, the Fourth Battle of the Isonzo of began and this time the brigade attacked Mengore and suffered another 1,100 casualties for no territorial gains.

[1][4][5][6] In 1916, the brigade remained in the Tolmin sector, but did not undertake any further attacks against the Austro-Hungarian positions of Bučenica and Mengore.

On 23 May, during the Tenth Battle of the Isonzo the brigade was on the Karst plateau, and tasked with attacking Flondar hill.

On 17-21 August 1917, during the Eleventh Battle of the Isonzo, the brigade attacked from Miren towards Orehovlje, where it suffered 1,600 casualties in 5 days.

However, due to the rapid advance of the Austro-Hungarian and German forces towards the Venetian Plain, the 3rd Army's line of retreat was in danger of being cut off and encircled.

Fifteen minutes later the remnants of the II Cavalry Brigade rode in formation south towards San Maria di Sclaunicco.

In October 1917, during the decisive Battle of Vittorio Veneto was deployed on the Asiago plateau, where it occupied Austro-Hungarian positions after the enemy had retreated.

In 1935-36 the 26th Infantry Regiment "Bergamo" provided 20 officers and 205 troops to units deployed to East Africa for the Second Italo-Ethiopian War.

[1][10][11][12][13][14][15][16] At the outbreak of World War II, the 26th Infantry Regiment "Bergamo" consisted of a command, a command company, three fusilier battalions, a support weapons battery equipped with 65/17 infantry support guns, and a mortar company equipped with 81mm Mod.

On 11 April, the division broke through the Royal Yugoslav Army defences near Drenova and captured the Kastav hill the same day.

After Yugoslavia's surrender the division remained in Dalmatia and garrisoned Makarska, Livno, Sinj, Ljubuški, Imotski and the island of Brač.

From 12 August to 2 September 1942, the division took part in the anti-partisan Operation Alba in Croatia, with the aim to destroy the partisan groups in the Biokovo east of Split.

In 1943, the division was garrisoned in Split and fought increasingly bloody skirmishes with partisans in the surrounding areas.

On 25 September 1943, the partisans left Split to avoid being encircled by the approaching German 7th SS Volunteer Mountain Division Prinz Eugen.

On 1 and 2 October 1943, the Germans massacred 50 of the captured officers, as retribution for General Becuzzi's surrender of the division's weapons to the Yugoslav partisans.

In 1986, the Armored Division "Centauro" was disbanded and the 26th Infantry Battalion "Bergamo" transferred to the Northwestern Military Region.