Mongols

Mongolia is a mentioned only location.

Background
The Khans base their culture on the history of the Mongol Empire. The remnants of these groups rebranded as the Great Khans and settled in the Mojave Wasteland. A book about the history of the Mongol Empire was found and brought to the region, entitled Pretty Pretty Horsies: A History of the Mongol Empire.

Appearances
Mongolia is mentioned in Fallout, Fallout 2, Fallout: New Vegas, and Fallout Shelter.

Behind the scenes

 * R. Scott Campbell described the Khans' inception, based on a real-life biker gang named after the Mongols.
 * Mongolia would have appeared in the canceled Fallout Extreme, home to a group of raiders known as the Huns.
 * The Mongols would have been mentioned in the intro to Fallout Pen and Paper d20.