The Tau Earth Caste is primarily made up of farmers, laborers, and technicians; responsible for building the machines, cultivating the food, and erecting the dwellings that allow the Tau to survive. The Earth Caste also includes artisans, scientists, and engineers. The sophisticated machinery and technology that drive the Tau Empire are all created by the foremost minds of the Earth Caste, including the legendary XV8 Crisis Battlesuit. The Tau of the Earth Caste are stouter of build than the normal Tau phenotype, and tend to have calloused hands and a pragmatic outlook on life. Their speech is very literal and matter of fact, often appearing to be quite monotonous to those not of their caste.
Before the coming of the Ethereals during the Mont'au, or Time of Terror, the Tau lived in separate tribes, the foundations of todays castes. Those destined to become the Earth Caste built cities and fortresses of stone to defend themselves against the neighboring tribes of plains dwellers, who would become the Fire Caste.
- Codex: Tau Empire (6th Edition)
- Farsight Enclaves - A Codex: Tau Empire Supplement (6th Edition) (Digital Edition)
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