In World War I the regiment's groups and batteries served on the Italian front.

[4][8] During the war the regiment was broken up and its groups and batteries attached to different Alpini units.

The Mountain Artillery Group "Oneglia" fought in 1915 in the Val d'Assa and then on Monte Coston.

In 1916 the group was deployed on the Melette, where it fought on the slopes of Monte Fior during the Battle of Asiago.

In 1917 the group remained initially on the Asiago plateau, where it fought for control of Monte Zebio.

[4] The Mountain Artillery Group "Genova" was deployed in 1915 on the Monte Altissimo and fought near Brentonico.

In 1916 the group was on Monte Zugna and the nearby Buole Pass during the Battle of Asiago.

In 1917 the group was on the Monte Cimone di Tonezza and then deployed in the Val d'Astico.

[4] The Mountain Artillery Group "Como" was deployed in 1915 on the Sass de Stria and then the Monte Piana.

[4] In 1919 the regiment was reduced to the groups "Oneglia", "Bergamo" and XXIX, each with three batteries with 75/13 mod.

[4][5][13] On 20 March 1939, the 19th Battery of the Group "Vincenza" was mobilized and the personnel, dressed in civilian clothes, embarked in the port of La Spezia for Spain.

After arriving on 25 March in Cadiz the Italian "volunteers" joined the Corpo Truppe Volontarie, which fought on the Nationalist side in the Spanish Civil War.

In June 1940 the division participated in the invasion of France in the Little St Bernard Pass sector.

[1][4][5][14][15] On 31 October 1940 the Group "Val Camonica" was disbanded and the following month the 2nd Alpine Division "Tridentina" was transferred to Albania to shore up the crumbling Italian front during the Greco-Italian War.

In April 1941, during the Battle of Greece, the division pursued the retreating Greek forces to Leskovik and Ersekë.

In preparation for the deployment to the Soviet Union the Alpine Artillery Group "Val Camonica", with the 28th and 29th batteries, was reformed in April 1942 and assigned to the regiment.

[4][5][16][17][18] On the evening of 17 January 1943, the Alpine Army Corps commander, General Gabriele Nasci, ordered a full retreat.

The 40,000-strong mass of stragglers — Alpini and Italians from other commands, plus German and Hungarians — followed the Tridentina division, which led the way westwards to the Axis lines.

On the morning of 26 January, the spearheads of the Tridentina reached the hamlet of Nikolayevka, occupied by the Soviet 48th Guards Rifle Division.

General Nasci ordered a frontal assault and at 9:30 am the Battle of Nikolayevka began with the 6th Alpini Regiment, the II Mixed Alpine Engineer Battalion, the Alpine Artillery Group "Bergamo", and three German Sturmgeschütz III leading the attack.

By noon the Italian forces had reached the outskirts of the village and the Alpine Army Corps' Chief of Staff General Giulio Martinat brought up reinforcements: the 5th Alpini Regiment, and the remaining alpine artillery groups "Vicenza" and "Val Camonica", as well as the remnants of the Alpini Battalion "L'Aquila" of the "Julia" division.

[4][5][16][17][18] By sunset the Alpini battalions were still struggling to break the reinforced Soviet lines and in a last effort to decide the battle before nightfall General Luigi Reverberi, commander of the Tridentina, ordered the remaining troops and stragglers, to assault the Soviet positions in a human wave attack.

Only one third of the Tridentina had survived the battles on the Don river and the following retreat (approximately 4,250 survivors of 18,000 troops deployed).

[1][2][4][5] On 1 April 1948 the Mountain Artillery Group "Bergamo" was reformed in Bolzano and assigned to the IV Territorial Military Command.

On 1 May 1951 the 2nd Mountain Artillery Regiment was reformed in Brixen and assigned to the Alpine Brigade "Tridentina", which had been formed the same day.

On 1 July 1956 the regiment formed a Light Aircraft Section with L-21B artillery observation planes, which in 1958 was transferred to the brigade command.

Afterwards the regiment consisted of the following units:[4][5][12][19] On 1 April 1970 all the mountain groups' mortar batteries were equipped with 105/14 mod.

On 30 September 1975 the 2nd Mountain Artillery Regiment was disbanded and the next day its remaining two groups became autonomous units and were assigned to the Alpine Brigade "Tridentina".

The same year the Group "Vicenza" formed a light anti-aircraft battery, which was equipped with M55 Quadmounts.

The same year, on 8 June, the Group "Asiago" was disbanded, followed on 27 July the Alpine Brigade "Orobica".