weaponry was the turret; apart from the Renault FT, this was the first tank to have a rotating turret mounted above the hull. The turret was made of four pieces rivetted together and had room enough for two crew members. Its weapon was a 65/17 howitzer (of 65mm caliber with a barrel 17 calibers long). Thanks to the tall turret and the space available beneath it, the gun's elevation was -10/+75°. Service This tank was often called 'the heaviest World War I tank' but this is not strictly accurate, since the FIAT 2000 never actually saw combat in World War I. Also, the modest order for 50 tanks was never completed, the only tanks produced being two prototypes. But at difference of the K-Wagen, was built and so is the heaviest tank of World War I. After the war the FIAT 2000 was displayed as one of the weapons used 'to defeat the enemy' and the two prototypes completed were sent to Libya to fight guerrilla forces, together with other tanks bought from France, in a special unit, the Tank battery (1° Batteria autonoma carri d'assalto). In Libya, the FIAT tank proved capable of an average speed of 4 km/h, and so, after two months its career ended, being unable to keep up with rapid movement of the enemy. One remained in Tripoli and the other was sent to Italy in the spring of 1919, where it performed before the King at Rome Stadium. The tank put on a convincing display: it climbed a 1.1 m wall, then faced another 3.5 m wall, which it knocked down with its weight. Then a trench of 3 m width was successfully crossed and several trees were knocked down. This impressive performance failed to revive interest in the heavy tank and so it was abandoned. The surviving FIAT 2000 at Rome was left in a depot for several years, until it was sent on the orders of Colonel Maltese to Forte Tiburtino, risking to catch fire during the travel. In 1934 it was seen again in a Campo Dux parade, having been repainted and even rearmed, with two 37/40 mm guns instead of the forward machine guns. It was later reportedly transformed into a monument at Bologna, after that its fate is unknown, like the other tank. Replica A project aimed at building a full-sized working replica of the Fiat 2000 has been