How would you make Humanoid Tribes distinctive? [Request for Campaign Help]

[nopantsyet]

Also, determine the relationships between the tribes. So will have alliances based on location, common values, or necessity of trade or defense. Others will be enemies because of long-standing fueds, border or resource disputes, opposed religions or alignments, or simple bellicosity.

Separate them by terrains. Plains tribes will live differently than forest dwellers. Their dress, lifestyle and weaponry should reflect that.

Religion is always good. Some worship ancestors, others worship nature or animals, ; some worship simply, others favor ritual and ceremony.