Human

Humans are the most numerous of the sentient species on Khos.

Origins
Humans evolved from ancestors resembling apes, most of whom were killed off by the Rhashokyn. Other surviving species from this family include the Red Apes and various monkeys in the Ixxonwood region. The earliest humans appeared in Ystrifal.

Migration
When Khos began it's ice age, Ystrifal became devoid of food, and humans were forced to leave. The majority of humanity was split in two at this point, those who crossed the waters to the West to Lemykra, and those who went Southeast to Tzof Thur. The latter became trapped underground by the Rhashokyn, where they evolved to become Thurians. The Lemykrans settled for some time, developing their own culture and language, naming themselves Sei. The Sei who were strong and hardy enough to survive the harsh climite of the North stayed to become Northlanders. The rest moved further down the continent to warmer environments. When the Sei discovered Syros River, there was another schism: between those who wished to continue South, and those who wished to follow Syros. Those who followed Syros created the settlement now called Eightspire, eventaully naming themselves Ironlanders. As the rest of the Southbound Sei headed through the Amin valley,  the Rhashokyn empire was at its peak dominance in Lemykra. Some human tribes encountered hordes these great reptilians for the first time, becoming scattered among the hills and rivers of this area, becoming Midlanders. Finally those who could travel fast enough and could endure the heat migrated through Salt Valley into the arid continent, Numiib, becoming Southlanders.

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The five races of humanity were able to evolve in peace and isolation thanks to the Archons defeating the Rhashokyn. Each race had thousands of years to adapt to its surroundings, resulting in each race's unique set of physical traits.

Growth
In FE 1, The Ironlanders discovered cast iron. Immediately, eight "Angels" appeared to teach these humans the The Doctrine. This new knowledge accelerated the Ironlander's technology tenfold, and the Angelic Church spread across Lemykra and Numiib to replace Sei culture.