The regiment is the engineer unit of the Cavalry Brigade "Pozzuolo del Friuli".

After the announcement of the Armistice of Cassibile on 8 September 1943 the regiment was disbanded by invading German forces.

In 2000, the 3rd Engineer Regiment was assigned to the Cavalry Brigade "Pozzuolo del Friuli".

[5][7] The regiment's anniversary falls, as for all engineer units, on 24 June 1918, the last day of the Second Battle of the Piave River.

After the end of World War I the Royal Italian Army reorganized its forces and on 31 March 1920, the 3rd Engineer Regiment (Telegraphers) was disbanded.

On 13 May 1943, the grouping surrendered with the remaining Axis forces in Tunisia and was declared lost due to wartime events.

In the evening of 8 September 1943, the Armistice of Cassibile, which ended hostilities between the Kingdom of Italy and the Anglo-American Allies, was announced by General Dwight D. Eisenhower on Radio Algiers and by Marshal Pietro Badoglio on Italian radio.

[7][5] At the beginning of the Cold War the Italian Army formed five pioneers fortification battalions, which were tasked with emplacing minefields to block likely Warsaw Pact invasion routes and tasked with manning reactivated Alpine Wall fortifications guarding these minefields.

The battalions were assigned to the Italian Army's two frontline corps in the following manner:[9] On 1 April 1954, the 3rd Engineer Grouping was formed in Conegliano.

The grouping was assigned to the V Army Corps and took command of the I, II, and III pioneers fortification battalions.

On 1 July 1954, the V Pioneers Fortification Battalion moved from Sterzing to Orcenico Superiore and joined the 3rd Engineer Grouping.

Each assault platoon consisted of two sapper teams, which were equipped with Model 38 submachine guns, hand grenades, and bangalore torpedoes, and two support teams, which were equipped with heavy machine guns and light mortars.

[7][5][15] On 12 November 1976, the President of the Italian Republic Giovanni Leone assigned with decree 846 the flag and traditions of the 3rd Engineer Regiment to the battalion.

As part of the reform the battalion received the two Silver Medals of Military Valor and the two Bronze Medals of Military Valor, which had been awarded to the XXX, XXXI and XXXII sappers battalions for their service during World War II.

[7][5] On 1 December 2000, the 3rd Engineer Regiment joined the Cavalry Brigade "Pozzuolo del Friuli".

On 28 May 2004, the President of the Italian Republic Carlo Azeglio Ciampi granted the battalion a flag.

Consequently, the Silver Medal of Military Valor and Bronze Medal of Military Valor, which were awarded to the two battalions during World War II, were transferred from the flag of the 3rd Engineer Regiment to the flag of the new regiment.

On 5 and 6 August 2004, forces of Muqtada al-Sadr's Mahdi Army fought units of the Cavalry Brigade "Pozzuolo del Friuli" for control of the three main bridges over the Euphrates river in Nasiriyah.