The division into five tribes is more a matter of traditional than based on modern research.

The army broke up into tribes the moment it was over the hill.

They are divided into 120 tribes; none have more than 10% of the population.

They were divided into four tribes based on their age and gender.

People can tap into many tribes based on their individual interests.

Here they were divided into two tribes, each gang having 3 girls and 4 boys.

The people are, like the Congo, divided into many tribes that often fight.

I was expecting to see that your group had broken into smaller tribes.

In the past, boys and girls divided into Indian tribes to compete against one another.

Five thousand million, all of the same race but divided into hostile tribes.