[3][4] In 1909, the Royal Italian Army requested a light multi-role truck to transport personnel and materials.

[5] This new model inaugurates a technical novelty on this type of vehicle: the fuel pump replacing a gravity feed.

[7][additional citation(s) needed] The Fiat 15 was the stalwart of the first motorization of the Italian armed forces and the Royal Army acquired all versions of the truck in many configurations, including ambulance, garage, and fire engine.

After the Great War, the Fiat-Terni Tripoli bus was produced on the chassis of the Fiat 15 ter by the steel mills of Terni.

During this campaign, the squadrons were also motorized with numerous Fiat 15 ter trucks (defined at the time as "tanks"), protected with armored metal plates and armed with three Schwarzlose machine guns with 15,000 rounds, conducted by a crew of four men.

[citation needed] Many copies were also delivered to Russia; 1,319 trucks were assembled at the AMO factory in Moscow between 1917 and 1919 with parts supplied by Fiat.