"Know also, O prince, that in the selfsame days that the Cimmerian did stalk the Hyborian Kingdoms, one of the few swords worthy to cross with his was that of Red Sonja, warrior-woman out of majestic Hyrkania. Forced to flee her homeland because she spurned the advances of a king and slew him instead, she rode west across the Turanian steppes and into the shadowed mists of legendry." ---The Nemedian Chronicles
She lived in a savage world in an uncivilized age - a world ruled by men and governed by the sword. They called her Red Sonja - for her flame-red hair, and for the smoldering fire of her pride which gave her sword-arm a strength that few men could match, and none had ever defeated.
— Description from Comic Vine community (comicvine.gamespot.com · https://comicvine.gamespot.com/the-adventures-of-red-sonja/4050-20521/).