The division and regiment were located on the Greek island of Cephalonia when the Armistice of Cassibile was announced on 8 September 1943.

In 1976 the regiment was reduced to 33rd Heavy Self-propelled Field Artillery Group "Terni" and assigned to the Mechanized Division "Folgore".

In April 1916 the regiment returned to the Col di Lana, and then was sent to fight on the glacier of the Marmolada.

In fall 1917 the regiment was deployed on Monte Sief again, but after the defeat in the Battle of Caporetto the Italian armies were forced to fall back to the Piave, where the regiment fought at Vidor and then Monfenera during the First Battle of the Piave River.

In the Second Battle of the Piave River in June 1918 the regiment was positioned on the Col del Miglio.

In December 1940 the division was sent to Albania to reinforce the Italian lines in the Greco-Italian War.

After the Greek surrender the division occupied the islands of Corfu, Lefkada, Zakynthos and Cephalonia.

[2] After the Armistice of Cassibile was announced on 8 September 1943 the division resisted German orders to surrender.

[1][2][3] On 1 February 1947 the 33rd Field Artillery Regiment was reformed in Pisa with two groups with QF 25-pounder field guns and one anti-aircraft group with 40/56 anti-aircraft autocannons ceded by the 184th Artillery Regiment "Folgore".

Between April and September 1956 the regiment formed two light aircraft sections with L-21B artillery observation planes.

During the same year the Infantry Division "Folgore" transferred its Artillery Specialists Unit to the regiment.

[2][4] During the 1975 army reform the army disbanded the regimental level and newly independent battalions and groups were granted for the first time their own flags: on 31 August the regiment's II Field Artillery Group was disbanded.

To avoid confusion with the support units of the Motorized Brigade "Acqui" the group was named for the city of Terni, where the 33rd Field Artillery Regiment had been formed.

In 1986 the Italian Army abolished the divisional level and so on 31 October 1986 the Mechanized Division "Folgore" was disbanded.

The next day the group entered the reformed 33rd Heavy Field Artillery Regiment "Acqui".

The 33rd Self-propelled Field Artillery Regiment "Acqui", which incorporated the disbanded regiment's personnel, materiel and base, was equipped with M109L 155 mm self-propelled howitzers and assigned to the Mechanized Brigade "Acqui".