Kos is a small kingdom that was founded by warriors who were banished fro Amnathal early in its creation. They created a kingdom built on the strength of its people. The people of Kos live by the code if you are weak you die, as such they all have come to worship the god Kord.
The current king of Kos Grot came into power when he murdered Vascal the previous king and his family. Vascal was considered the greatest warrior in Kos and Grot killing him solidified his claim to the throne as no one in the kingdom would face him after. Grot now actively seeks out stong warriors to battle and prove his strength.
Kos has large rolling hills and deep gorges jutting out with massive rocks. The landscape is harsh like its people and forests in Kos are scarce therefore many of its homes are made of stone.