The Tau Empire

A young race, being less than six-thousand years old, that is very ambitious. It combines advanced technology with mobility. The Tau are split into five different castes, four being the four elements; earth, air, water, and fire. The fifth caste are the Ethereals, or the leadership of the Tau Empire. Their main infantry unit is called a Fire Warrior or Shas'la. This would be about the level of a private. The next level is called a Shas' ui. From there, it's Shas'vre, and finally Shas'o or commander.

Castes:

Ethereal Caste- rulers

Fire Warriors- soldiers

Water caste- merchants and ambassadors

Earth caste- workers and technitions

Air caste- pilots