Several factors delayed and greatly hampered the development of an Italian medium tank during World War II. The first was the strategic stance of the country, focussed on a war against neighbouring countries such as France and Yugoslavia, and ill-prepared for a war in the Western Desert. Since these European countries bordered with Italy in mountainous areas, light tanks were preferred as these were deemed much more suitable for the narrow roads and bridges of the Alps. Furthermore, development was hampered by the limited number of Italian industries, whose production was also heavily fragmented. All these factors delayed the development of the first prototype of an Italian medium tank – the M 11 – which would only appear in 1937 and did not enter production until 1939. Although technically inferior to their German and Allied counterparts in 1941–43, the Italian M tanks proved to be quite effective when used by experienced crews with adequate combat tactics. In fact, their major shortcoming actually proved to be their limited production figures. While production was limited, innovation was not and, between 1941 and 1943, several experiments were carried out on the Italian tanks that produced interesting prototypes such as the anti-aircraft semovente.

The Royal Italian Army's 'M' series tanks began with the Fiat-Ansaldo M 11-39 in 1939 and continued with the M13-40, M 14-41 and the M 15-42. Medium tanks served on all Italian fronts during WWII. Although outperformed by most Allied armored vehicles, these tanks and self-propelled guns were Italy's armored defense throughout WWII.

Several factors delayed and greatly hampered the development of an Italian medium tank during World War II. The first was the strategic stance of the country, focussed on a war against neighbouring countries such as France and Yugoslavia, and ill-prepared for a war in the Western Desert. Since these European countries bordered with Italy in mountainous areas, light tanks were preferred as these were deemed much more suitable for the narrow roads and bridges of the Alps. Furthermore, development was hampered by the limited number of Italian industries, whose production was also heavily fragmented. All these factors delayed the development of the first prototype of an Italian medium tank – the M 11 – which would only appear in 1937 and did not enter production until 1939. Although technically inferior to their German and Allied counterparts in 1941–43, the Italian M tanks proved to be quite effective when used by experienced crews with adequate combat tactics. In fact, their major shortcoming actually proved to be their limited production figures. While production was limited, innovation was not and, between 1941 and 1943, several experiments were carried out on the Italian tanks that produced interesting prototypes such as the anti-aircraft semovente.

The Italian army, unlike those of the British and French, did not use tanks in combat during World War I and, by November 1918, only one training unit equipped with French Schneider and Renault tanks had been formed. Consequently, during the 1920s the Italian army had just one single tank type in its armoured inventory – the Fiat 3000. Only in 1927 was the first tank unit formed as a branch of the infantry and not as an independent organization, while the cavalry rejected the idea of both tanks and armoured cars and decided to stand by the use of horses for its mounted units. Between 1933 and March 1939, a further 2,724 CV 33 / L 3 tanks were built, 1,216 of which were exported all over the world. By the time Italy entered the war in June 1940, the army had 1,284 light tanks, 855 of which were in combat units, including three armoured divisions. Variants of the CV 33 / L 3 tanks included flame-throwers, bridge-layers, recovery vehicles, and a radio command tank. Some L 3 tanks were still in use in 1945, by both the Germans and the German-allied Italian units of the Repubblica Sociale.

The Italian army, unlike those of the British and French, did not use tanks in combat during World War I and, by November 1918, only one training unit equipped with French Schneider and Renault tanks had been formed. Consequently, during the 1920s the Italian army had just one single tank type in its armoured inventory – the Fiat 3000. Only in 1927 was the first tank unit formed as a branch of the infantry and not as an independent organization, while the cavalry rejected the idea of both tanks and armoured cars and decided to stand by the use of horses for its mounted units. Between 1933 and March 1939, a further 2,724 CV 33 / L 3 tanks were built, 1,216 of which were exported all over the world. By the time Italy entered the war in June 1940, the army had 1,284 light tanks, 855 of which were in combat units, including three armoured divisions. Variants of the CV 33 / L 3 tanks included flame-throwers, bridge-layers, recovery vehicles, and a radio command tank. Some L 3 tanks were still in use in 1945, by both the Germans and the German-allied Italian units of the Repubblica Sociale.

The Carro Armato M13/40 was an Italian World War II tank designed to replace the M11/39 in the Italian Army at the start of World War II. It was the primary tank used by the Italians throughout the war. The design was influenced by the British Vickers 6-Ton and was based on the modified chassis of the earlier M11/39. Production of the M11/39 was cut short in order to get the M13/40 into production. The name refers to "M" for Medio (medium) according to the Italian tank weight standards at the time, 13 tonnes was the scheduled weight and 1940 the initial year of production.

The M11/39 tank was the transitional tank between the L3 fast tank and the M 13/40. The M11/39 can be considered the first Italian medium tank, with a weight of 11 tonnes and armament that consisted of a 37 mm cannon in the casemate and two Breda Mod. 38 8 mm machine guns in the turret. One of the weak points was the low-powered engine, the cannon placed in the casemate and the lack of radio equipment. Unsuitable for desert warfare. Despite its weaknesses, the M11/39 represented an important step forward in the history of Italian armoured vehicles, as it paved the way for the medium tank family, which was used throughout the war.