The regiment is equipped with Ariete main battle tanks and assigned to the Bersaglieri Brigade "Garibaldi".

During World War II the regimental command was sent to Libya, where it fought in the Western Desert campaign.

[4][5] In March 1941, the regiment was reformed, but it remained in Rome for the rest of the war as a training command.

The six battalions, like all tank battalions at the time, were named for infantry officers, who had served in World War I and been awarded posthumously Italy's highest military honor the Gold Medal of Military Valor.

The battalion arrived in Rhodes in September of the same year and was attached to the 50th Infantry Division "Regina".

In July 1940, the regiment received the LXIII Tank Battalion L from the 63rd Infantry Division "Cirene".

On 5 August 1940, the regiment's tanks clashed with British units for the first time near Sidi Azeiz.

[4][5] On 29 August 1940, the tank battalions in Libya were used to form the Babini Group, which consisted of three formations:[6] On 9 September 1940, the I Tank Grouping participated in the Italian invasion of Egypt, which initiated the Western Desert campaign.

[7] Between 3 and 5 January 1941, the V, XX, LXI, and LXII tank battalions L were destroyed in the Battle of Bardia.

On 20 January, during the British capture of Tobruk the position of the 4th Tank Infantry Regiment was overrun by the 19th Australian Brigade with such ferocity that 70% of the remaining officers, including both battalion commanders, and 50% of the remaining troops of the regiment were killed in action.

On 24 January the Babini Group clashed inconclusively with the 7th British Armoured Division at Mechili.

After Mechili the remnants of the Italian 10th Army retreated further East to Beda Fomm, where the British successfully cut off the line of retreat and destroyed the Italian 10th Army and with it the III, V, VI, and XXI tank battalions M13/40 on 6-7 February during the Battle of Beda Fomm.

[8] On 25 January 1941, the 4th Tank Infantry Regiment was declared lost due to war time events.

[2][4][5] On 30 December 1940, Germany had offered Italy to 360 R35 light tanks, which German forces had captured in France.

On 17 May 1941, the regimental command of the 4th Tank Infantry Regiment embarked in Naples on the troop ship SS Conte Rosso, which was torpedoed and sunk on 24 May off Capo Murro di Porco by the Royal Navy submarine HMS Upholder.

In December 1941, the regiment's depot formed the II Tank Battalion Lf (with Lf standing for Italian: "Lanciafiamme" or Flamethrower), with two companies, which were soon joined by a third company, which had been raised by the 1st Tank Infantry Regiment.

Two days later, on 10 September, Second Lieutenant Vincenzo Fioritto led a force of eleven tanks of the 4th Tank Infantry's depot to support the grenadiers of the 1st Regiment "Granatieri di Sardegna", the lancers of the Regiment "Lancieri di Montebello", remnants of the 12th Infantry Division "Sassari" and hundreds of civilians in the defense of Porta San Paolo against attacking German forces.

For this conduct and service Vincenzo Fioritto was awarded Italy's highest military honor the Gold Medal of Military Valor and in 1975 the LXIII Tank Battalion was named 63rd Tank Battalion "M.O.

The reformed regiment was assigned to the Armored Division "Pozzuolo del Friuli", which had been formed on the same date.

Tank and armored battalions created during the 1975 army reform were named for officers, soldiers and partisans of the tank speciality, who had served in World War II and been awarded Italy's highest military honor the Gold Medal of Military Valor.

The 20th Tank Battalion was named for Second Lieutenant Livio Pentimalli, who, while serving as commander of III Platoon, 1st Company, XI Tank Battalion M13/40, had distinguished himself on 26 May 1942 during the Battle of Gazala and been killed in action on 21 June 1942 during the Axis capture of Tobruk.

[5][10] On 12 November 1976 the President of the Italian Republic Giovanni Leone assigned with decree 846 the flag and traditions of the 4th Armored Infantry Regiment to the 20th Tank Battalion "M.O.

[5][11] After the end of the Cold War Italian Army began to draw down its forces and on 30 January 1991, the 20th Tank Battalion "M.O.

Scapuzzi" in Civitavecchia lost its autonomy and transferred the flag of the 33rd Tank Regiment, which had been assigned to the battalion in 1976, to Ozzano dell'Emilia, while on the same day the flag of the 4th Tank Regiment was transferred from Ozzano dell'Emilia to Civitavecchia.

Scapuzzi" entered the 4th Tank Regiment, which on the same date was assigned to the Mechanized Brigade "Granatieri di Sardegna".