The Kingdom of Birsartanšes was a successor state of the Phoenix Empire located in Western Bulwar around the fortress of Birsartansbar. It originated from the demesne of Amarien I, governor of Imulušes nominated by Jaher in 1009.
By 1444, the Kingdom had weakened following the Decades of Devastation, the Birzartansesi-Baharkandi war and Dartaxes rebellion but would endure a new silver age under the reign of Keladora I Birzartanzuir.