Tarnaria is a loosely defined region which encompassed the east part of the Continent and connected by languages, politics and the Xaewoon religion. The significance of Tarnaria as an identifier has gone down in the past several centuries, mostly due to the formation of multiple states, whereas for the majority of its history Tarnaria was decentralized and nomadic.

In the second revolution its western borders were at Loodon, Teamatian, Yammoe and Kwalee.