It is unknown when the tribe organized. The twins, Raven and Qrow Branwen, were raised in the tribe that consisted, according to Qrow, of murderers and thieves. The tribe sent the twins to enroll in combat school in order to learn how to counter the Huntsmen, the only major threat toward the tribe other than Grimm. The two ended up attending Beacon Academy and comprised half of Team STRQ. Raven eventually returned to the tribe and became its leader, but Qrow did not, having grown to dislike their previous lifestyle.
The tribe prioritizes its survival, holding a Darwinistic view. They are responsible for multiple raids on villages, like Shion.
They normally do not deal in trafficking people, but Weiss Schnee was the only exception.
After the camp is discovered by members of Salem's Faction, Raven orders the tribe to move.