The military forces of the Imperium had sacrificed much, including severe losses suffered by several Chapters of the Adeptus Astartes.
This was the largest founding since the Second Founding, when the Space Marine Legions were broken down into separate Chapters. This founding took place in the wake of the near-disastrous War of the Beast, when the Imperium of Man was brought to its knees by the largest Ork WAAAGH! seen since the waning years of the Great Crusade. They were created during the 4 th Founding in 546.M32. The Knights of Death is a Loyalist Codex Astartes- compliant Successor Chapter of the Salamanders.