The Deathwing is the elite 1st Company of the Dark Angels Space Marine Chapter. While most other Chapters allow their 1st Company squads to take to the field in a variety of configurations as befits the tactical situation, the entire 1st Company of the Dark Angels Chapter consists of dedicated squads of Terminator Armour-clad veterans. This specialty formation is also found amongst those Space Marine Chapters who are Successors of the original Ist Legion, which are collectively known as the Unforgiven. The Deathwing's mission takes precedence over all others, even though they may be called upon to fight a wide range of foes. Members of the Deathwing are indoctrinated into the outermost tiers of the Unforgiven's Inner Circle, and party to the some of the terrible secrets surrounding the existence and nature of the Fallen. Some members of the Deathwing may know the identity of those they fight, while others are unaware they were once loyal Dark Angels, but all members of the Dark Angels 1st Company, and indeed the 1st Company of every Unforgiven Chapter, know that the Fallen are the vilest of heretics and must be persecuted above all others.