During World War II the regiment formed the 9th and 41st army corps artillery groupings.

The regiment and 9th Army Corps Artillery Grouping were disbanded by invading German forces after the announcement of the Armistice of Cassibile on 8 September 1943, while the 41st Army Corps Artillery Grouping remained active until September 1944.

[1] This article is about the Royal Italian Army's 9th Heavy Field Artillery Regiment, which was a support unit assigned to a corps-level command.

[1] On 1 August 1920 the 9th Heavy Field Artillery Regiment was formed in Ancona by reorganizing and renaming the 31st Field Artillery Regiment, which consisted of the I and II groups with 105/28 cannons and the III Group with 149/12 howitzers.

One month later, on 1 November 1937, the Complement Officer Cadets School in Potenza became an autonomous unit again and left the regiment.

[1] In January 1939 the regiment's III Group with 149/13 heavy howitzers was mobilized and the personnel, dressed in civilian clothes, embarked for Spain.

There the Italian "volunteers" joined the Corpo Truppe Volontarie, which fought on the Nationalist side in the Spanish Civil War.

Back in Italy the regiment formed a new III Group with 149/13 heavy howitzers.

The depot was disbanded by invading German forces after the announcement of the Armistice of Cassibile on 8 September 1943.

In 1974 the regiment's III Group was placed in reserve status, and reformed as an active unit in 1975 in Persano.

[1][2] On 12 November 1976 the President of the Italian Republic Giovanni Leone assigned with decree 846 the flag and traditions of the 9th Heavy Field Artillery Regiment to the group.