The regiment's anniversary falls on 5 January, the last day of the Battle of Bardia, which concluded the operational cycle 1940-41 of the Western Desert campaign.

On 1 October of the same year, the regimental command and depot, which included training and maintenance units, moved from Rome to Bologna.

On 22 August 1934, the III Battalion left Bassano del Grappa and moved to Mantua and one year later to Brescia.

Consequently the regimental depot in Bologna began to form assault tank battalions, which were intended as support units for the army's corps formations.

In September of the same year, the depot formed the XX Assault Tanks Battalion "Randaccio", which was transferred to Italian Eritrea, where it fought the Second Italo-Ethiopian War.

At the beginning of September 1936, the XXIII Assault Tanks Battalion "Stennio" was assigned to the 8th Infantry Division "Po", which was being deployed to Libya for the duration of the Second Italo-Ethiopian War.

Additionally the regiment was administratively and logistically responsible for all tank units deployed in the Italian colonies of Libya, Eritrea, and Somaliland.

On 25 April 1937, the Colonel Valentino Babini, who had been the commander of the 3rd Tank Infantry Regiment, arrived in Spain and took charge of the Specialized Units Grouping of the Italian Corpo Truppe Volontarie.

Afterwards the regiment called up reservists and formed a Complements Battalion, which on 23 February 1941 was sent to Albania to help bring units fighting in the Greco–Italian War back up to full strength.

[1] In North Africa the V Tank Battalion L was assigned to the 17th Infantry Division "Pavia", with which it fought in the Western Desert campaign.

On 18 November 1941, the British Eighth Army commenced Operation Crusader, which aimed to break the Siege of Tobruk.

On 23 November 1941, the 70th Infantry Division attacked the Axis siege ring the Pavia was sent to stem the British breakthrough.

[1] On 8 September 1943, the Armistice of Cassibile was announced and shortly thereafter invading German forces disbanded the 3rd Tank Infantry Regiment.

For its conduct and sacrifice between 9 December 1940 and 5 January 1941 the IX Tank Battalion L was awarded Bronze Medal of Military Valor.

The regiment was operationally assigned to the Infantry Division "Granatieri di Sardegna", but also provided training support to the Mechanized and Armored Troops School in Caserta.

The 9th Armored Battalion was named for Gaetano Butera, a soldiers of the 4th Tank Infantry Regiment, who had joined the Italian resistance movement after the German occupation of Italy and was murdered by the SS on 24 March 1944 in the Ardeatine massacre.

[1][6] After the end of the Cold War Italian Army began to draw down its forces and on 10 September 1991 the 9th Armored Battalion "M.O.