“Sumia: A unified kingdom to Ylisse's north. Inhabited by barbarians, or so it's said.
Chrom: Warriors are what they are, and we'll need their strength to quell this new menace.”
—Sumia and Chrom to Avatar
Regna Ferox (Kingdom of Felia in the Japanese version) is a kingdom in Fire Emblem: Awakening, located north of the Halidom of Ylisse. Unlike the peace-loving Ylisse, Ferox is a militant nation that values strength over all things although they are still firm allies of Ylisse. Ferox has two rulers known as Khans - Flavia of the East and Basilio of the West. The ruling Khan is decided by their prowess in a grand fighting tournament at Arena Ferox. Chrom initially travels to Ferox to seek their assistance in dealing with the double threat of Plegia and the Risen.
Flavia explains to Chrom that periodic tournaments are held to establish the next ruling Khan. Each Khan chooses a champion not of their family to compete for them. This way, competing Khans do not have to risk their lives or the life of a family member, preventing dead leaders and avoiding blood feuds.