Tribes of the six kings

Viking overview, to be expanded:
Settle around the Great Mountain, these human tribes were the first settlers in the lands surrounding the Inner Sea. Originally they were seven, however one of the Kings broke off from the Oath and settled further south in the Westlands, establishing the city of Emor and what is now known as the primary human culture on the continent. The vikings, however, persevered and even flourished. Raiding the many farming settlements that span the Greenlands, the six tribes have established a firm grip on the middle of the continent and have claimed all the territory surrounding the Great Mountain solely for themselves, prospering from the many gifts the Inner Sea washes ashore.
They have managed to make enemies with everyone, from the various kingdoms of elves to the north and northeast, the dark elves in the southwest, and with every other human culture. They attack, raid and pillage anyone that comes close to their territories or lives near enough, however they also provide a natural and very potent barrier from threats that come from the sea. It brings gifts as often as it brings doom, and the mighty warriors of the tribes of six kings are the only ones that can muster a powerful enough resistance.
Raised as warriors from little kids, the vikings learn the way of spear, sword and bow from the earliest age, starting their training as early as one or two years old. They are beaten until their bodies harden enough so that spears break and the whips they use bounce from their backs as if they hit on stone. Perhaps due to their proximity with the Mountain, or other reasons unknown, they are naturally attuned to the arcane and much like the dark elves, their bodies are infused with Force, it is a natural part of their existence. Their greatest power is force of will, however instead of tranquillity and presence of mind, they learn to channel is through rage and a profound desire for victory, beaten into them from the most tender age.