The Fiat-Ansaldo M11/39 was an Italian medium tank used from 1939 through the early period of World War II. Although designated a medium tank by the Italian Army, in weight and firepower it was closer to contemporary light tanks. The official Italian designation was Carro Armato ("armored tank") M 11/39. The designation M11/39 is understood as follows: "M" for Medio (Italian: "medium"), followed by the weight in tons (11) and the year of adoption (1939).