In order to have survived out in the Wilderness, these Tribefolk would need to be cunning, shrewd, intelligent, and brutal. Their skills in survival for adults without a doubt would have to be highly competent at the very least. The same with other associated skills required for living out there. A weapon skill, hunting, foraging, observation, land Navigation, and endurance. These would be a tough and hearty folk.
By the dangerous nature of the Wilderness only the strong would survive and thus their numbers would more than likely be limited. They would very much be might makes right society. Or at the least, respect strength and find the majority of those that live in cities to be soft. Though that could be either negative or positive trait depending on how desperate they would be for food. On occasion, they would make raids on the outskirts of cities. Either to steal food or other goods. Also, would it make more sense for them to be nomadic or stationary?
In terms of tools, they would not have ready access to metal tools, and any they would have would be stolen. Instead, they would make use of wood, bone, and stone tools. For instance, while they would not have access to say chainmail they would instead have access to Bone Armor. Specifically, they would use bone lamellar armor. With this, they would also use wood or rough leather armor.
Some examples of what bone armor could look like:
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In general, they would use whatever they can get their hands on. They would do what it takes to survive. I was also thinking they have their own notion of honor and have a martial culture among their warriors. However, I am not sure if it would fit in a society that is willing to do almost anything to survive. Also, there is the question of which god or gods they would follow. I am not entirely sure on some of these.
Thoughts?