An Auxiliary Reserve Cadre is a T'au Empire cadre comprised of T'au Auxiliaries. That means that this battle group is usually made up entirely of alien warriors allied to the T'au like the Kroot, Vespids and Human Gue'vesa.
Sources[]
- Codex: Tau Empire (6th Edition), pp. 8-12, 22-24
- Codex: Tau Empire (7th Edition), pp. 15-16