Rubuta ci gaba don wannan sakin layi - Fiat 3000 (Model 21) an fara amfani da shi a cikin aiki a watan Fabrairun 1926 a Libya, kuma daga baya kuma ya ga aikin da aka yi wa Habashawa a Yaƙin Italiya-Abyssinian na biyu a 1935. Ba ɗaya daga cikin tankunan da Italiyanci suka yi amfani da shi a Spain ba a lokacin yakin basasa na Spain. Tare da shigar Italiya cikin Yaƙin Duniya na II a watan Yunin 1940, an yi amfani da Fiat 3000s da yawa da ke aiki tare da Sojojin Italiya a kan aikin Girka-Albania. Sun kuma kasance daga cikin tankunan Italiya na ƙarshe don tsayayya da Allies, kamar yadda a watan Yulin 1943, lokacin da Allies suka sauka a Sicily
, kamfanonin tanki biyu na Italiya a tsibirin har yanzu suna sanye da 3000. An haƙa kamfani ɗaya kuma an yi amfani da motocin su a matsayin katanga, yayin da aka yi amfani da ɗayan kamfani a matsayin mai motsi don amsawa ga saukar amphibious a lokacin Yaƙin Gela, tare da 'yan tankuna kaɗan da suka tsira daga shirin Allied.