NEW T'au Empire Vs Thousand Sons: Casual Warhammer 40K Battle Report The T'au make their return with some new experiemntal upgrades using the Experimental Prototype Cadre Detachment vs the Thousand Sons in this epic clash of 10th edition Warhammer 40k. This game's factions will be using brand new rules and updates from the most recent Balance Dataslate and Munitorum Field Manual.