The ill-fated Lions Sable Space Marine Chapter was the last of the Second Founding Successor Chapters of the Dark Angels. During the unspoken period of Imperial history known as the Forgotten Wars (580.M31-632.M32), the Lions Sable were completely annihilated during a disastrous campaign into the Eye of Terror whilst in pursuit of the notorious Fallen Angel known as Cypher. Their subsequent fate and entire Chapter history was deliberately destroyed by the Dark Angels. Ironically, by the 33rd Millennium, when the sacred document known as the Apocrypha of Davio was written in an attempt to list all of the known Second Founding Chapters, the name Lions Sable had already been lost.