The C1 Ariete was developed by OTO Melara during the late Cold War to allow the Italian army to equip itself with a modern tank which could easily deal with Yugoslav and Warsaw pact tanks. The PSO (Peace Support Operation) modification entailed additional composite armour blocks on the sides of the tank, mainly to increase crew protection against RPG fire, though they were also found to work well against low level APFSDS and standard HEAT munitions.

Introduced in Update 1.91 "Night Vision", the C1 Ariete PSO is one of the slowest variants in the C1 Ariete family of vehicles, due to addition of the add-on armour kit surrounding the sides of the hull and turret. However, this add-on armour package is able to handle most low level autocannon fire from enemies from the BMP family and at times even some APFSDS rounds. The tank can be effective when in use by a player who can work around its lacklustre mobility and relatively weak frontal protection. It can also be a great back up for your top tier lineup if you choose to bring more than 1 variant of the C1 Ariete.