The Crimson Slaughter is a Renegade warband of Chaos Space Marines dedicated to Chaos Undivided. Originally they were known as the Crimson Sabres, a Loyalist Space Marine Chapter that may have belonged to the mysterious 13th Founding, also known as the "Dark Founding," which occurred sometime between the 35th and 36th Millennia. Their Chapter's reputation was built on ruthless efficiency and fastidious adherence to the Codex Astartes. Soon enough, signs that things were awry appeared in their Chapter history. These problems culminated with the genocidal war on Umidia. This world proved to be the fulcrum of change for the Crimson Sabres. The fighting there proved so intense that it changed the Chapter, as they found themselves cursed by the Chaos God Khorne, forever haunted by the fell voic