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The Carro Armato M11/39 was an Italian medium tank first produced prior to World War II. The M11/39 saw service in Africa and Italy (1939–1944). The official Italian designation was Carro Armato (armoured vehicle) M11/39. The designation for the M11/39 is as follows: "M" for Medio ("medium"), followed by the weight in tonnes (11) and the year of adoption (1939).

In Libya 72 × M11/39s were used in the North African Campaign, 24 operated in the East Africa Campaign and the first four prototypes remained in Italy. The M11 was vastly superior to the 36 × L3/33 and L3/35 tankettes stationed in East Africa. The M11/39 proved somewhat successful in early encounters with the British Light Tank Mk VI. The 37 mm gun of the M11 acted as a deterrent against attacks by these relatively fast but thin-skinned vehicles, armed only with machine guns. The tank was outclassed by heavier British cruiser and Infantry tanks, the Cruiser Mk I (A9), Cruiser Mk II (A10), Cruiser Mk III (A13) and Matilda.