Maybe you did; maybe you didn't. Tribes flow from blood, so wherever the other tribes were, there the blood flowed into the future. God knows where they are and He ain't telling, yet. The Tribe probably ought to be careful. 
We lost a few along the way. 8>)
Actually, there is a term among Jews to refer to other Jews -- M.O.T., i.e., Member of the Tribe. So there is a tendency that, at least I have, to think of a singular tribe.
Usage note: "M.O.T." is more often used as an adjective than a noun, as in "I never knew Harrison Ford was M.O.T."
Maybe you did; maybe you didn't. Tribes flow from blood, so wherever the other tribes were, there the blood flowed into the future. God knows where they are and He ain't telling, yet. The Tribe probably ought to be careful.