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|Homeworld=[[Tarrengast]]{{Fn|14}} in the [[Sutter Spiral Nebula]].{{Fn|6a}} Several additional [[Adeptus Astartes Recruiting World|Recruiting Worlds]]{{Fn|14}} such as [[Numina]], [[Ra]], [[Badwater]],{{Fn|6a}} and [[Cortiz-Pol]]{{Fn|99x}}{{CME}}

As many records of the Chapter's history are lost, the Raptors' exact origins are unclear. It is generally accepted that the Chapter is descended from the Raven Guard and was one of the first new Space Marine Chapters created during the Second Founding in [[M31]]. According to one widely believed theory, the Raptors originated as a Raven Guard [[Space Marine Legion|Legion]] company of new [[initiates]] training on [[Deliverance]] at the time of the [[Drop Site Massacre]].{{Fn|66x}}{{CME}}{{Fn|14}} This company was subsequently sent against the followers of [[Horus]] in remote parts of the [[Galaxy]], thus diverging from the rest of the Raven Guard.{{Fn|14}} Having distinguished itself in the civil war, the company was subsequently reorganized as a Chapter amid the reforms initiated by the [[Codex Astartes]]. The fledgling Raptors then began their service to the [[Imperium]] as a [[fleet based]] Chapter hunting down the forces of the [[Traitor Legions]] in the [[Great Scouring]].{{Fn|66x}}{{CME}}{{Fn|14}}

Several centuries after their founding, the Raptors were granted a [[homeworld]] on the edge of the [[Eye of Terror]], the name of which was lost in the passage of time. Sometime between [[M34]] and [[M36]], the Raptors' original homeworld was believed to have been destroyed some time during the [[4th Black Crusade|4th]] or [[5th Black Crusade]]. In [[M37]], Imperial records listed the Chapter as destroyed or missing in action; the Raptors disappeared for the next two thousand years.{{Fn|66x}}{{CME}}{{Fn|14}}

In early [[M39]], the Raptors suddenly reappeared on the Imperial order of battle during the [[Caberiad Wars]] at full chapter strength. By then, they were based on a new homeworld, [[Tarrengast]], within the [[Sutters Spiral Nebula]]. However, the Raptors did not not reveal their new homeworld's exact location or name to any outsiders, including other Imperials.{{Fn|66x}}{{CME}}{{Fn|8a}}{{Fn|14}}

*{{Endn|6}}: [[Imperial Armour Volume Nine - The Badab War - Part One]]

*{{Endn|9}}: [[Fire Warrior (Novel)]], {{Cite This}}