Warhammer 40k Sentinel Ambush

Routine patrol of Elysian Sentinels - 83rd Regiment "Skulltakers" turning into a disaster after being ambushed by rouge elements of local PDF turncoats under the influence of Tau Xenos. Date unspecifed, allegedly shortly after The Gravalax Incident of 931.M41. Planet and mission specifics CLASSIFIED by the order of Ordo Xenos.