This wing was developed by the Emperor himself in the Unification Wars for the purpose of exterminating threats to mankind too dire to be allowed to endanger the coming Great Crusade. Ironwing units were equipped with heavily armored vehicles such as Land Raiders and Dreadnoughts for their missions.
- 1: The Horus Heresy Book Six, pg. 269
- 2: Warhammer Community - Secret Orders of the Dark Angels (last accessed 14 January 2018)