Omsk

A realm destroyed in the great northern war

From what I can tell Omsk controlled the northern peninsula which consists of the regions of Gadlock, Kazakh and Kazan. They were allies with Oligarch and were destroyed by the combined armies of Rancagua, Eleador and Sirion. The War was called the Northern War and when Omsk was destroyed Oligarch escaped the feat of extermination because of the New Rancagua Theocracy.

A new realm called the Sultanate of Asena emerged from the three regions.