This unit has the following abilities: And They Shall Know No Fear, Bolter Discipline, Shock Assault and Combat Doctrines.
During deployment, if every model in this unit has this ability, then you can set up this unit high in the skies instead of setting it up on the battlefield. If you do, then in the Reinforcements step of one of your Movement phases you can set up this unit anywhere on the battlefield that is more than 9" away from enemy models.
Each time a model in this unit makes an attack with an accelerator autocannon against an enemy INFANTRY unit, if a hit is scored, that enemy unit cannot fire overwatch this turn.