The Fiat 3000, whose design was based on that of the French Renault FT, was the first tank to be produced in series in Italy. It was to be the standard tank of the emerging Italian armored units after World War I.

Although 1,400 units were ordered, with deliveries to begin in May 1919, the end of the war caused the original order to be cancelled and only 100 were delivered. The first Fiat 3000s entered service in 1921 and were officially designated as the carro d'assalto Fiat 3000, Mod. 21. ("Fiat 3000 assault tank, Model 21"). Tests of the Model 21 revealed that the armament, consisting of two 6.5 mm machine guns, was inadequate, and adoption of a 37 mm gun as main armament was urged.

The up-gunned version of the 3000, armed with a 37/40 gun, was tested in 1929 and was officially adopted in 1930 with the designation of carro d'assalto Fiat 3000, Mod. 30. The Model 30, in addition to its improved armament, also differed from the Model 21 in that it had an improved engine developing more power, its suspension was improved, the engine compartment had a different silhouette, and external stores were stowed differently. Some Model 30s were also produced with two 6.5 mm machine guns as main armament, as on the Model 21, in lieu of the 37 mm gun. A limited number of Model 21 vehicles were exported to Albania, Latvia and Abyssinia (Ethiopia) prior to 1930.

Fiat S.p.A., (Fabbrica Italiana Automobili Torino) (Italian Automobile Factory of Turin), is an Italian automobile manufacturer based in Turin. Fiat was founded in 1899 by a group of investors including Giovanni Agnelli. During its more than a century long history, Fiat has also manufactured railway engines and carriages, military vehicles, and aircraft. As of 2009, the Fiat group (not inclusive of its subsidiary Chrysler) was the world's ninth largest carmaker and the largest in Italy.

Fiat-based cars are built around the world. Outside Italy, the largest country of production is Brazil, where the Fiat brand is the market leader. The group also has factories in Argentina and Poland and a long history of licensing production of its products in other countries. It also has numerous alliances and joint ventures around the world, the main ones being located in Italy, France, Turkey, Serbia, India and China.

Agnelli's grandson Gianni Agnelli was Fiat's chairman from 1966 until 1996; he then served as honorary chairman from 1996 until his death on 24 January 2003, during which time Cesare Romiti served as chairman. After their^{[clarification needed]} removal, Paolo Fresco served as chairman and Paolo Cantarella as CEO. Umberto Agnelli then took over as chairman from 2003 to 2004. After Umberto Agnelli's death on 28 May 2004, Luca Cordero di Montezemolo was named chairman, with Agnelli heir John Elkann becoming vice chairman (at the age of 28), and other family members also serving on the board. At this point, CEO Giuseppe Morchio resigned, and Sergio Marchionne was named to replace him on 1 June 2004.