The XN-1 Cha-Shazu was a derivative of the Sharzi PZ-20 Martur, produced in great numbers by the Five-Fold Alliance during its war of resistance against Bilu in the Northern Expedition of NC 800-817.
In the early years of the Expedition, the FFA lacked an answer to the infamous Imperial Cataphract Corps. This changed in 805, when the Sharzi Kingdom began covertly funding the FFA; Sharzi Guns, Armour Jockies and Scientists fueled the destruction of Bilu's Imperial Ambitions.
Cha-Shazu skirmish units, trained (and occasionally led) by Sharzi Panzerritters, waged an effective guerilla war against the Imperial Forces in the sands of the Zulain; the casualties suffered by the Empire's 'elite' units contributed to the collapse of war support in Bilu.