"Apparently, a wing of Dark Eldar is scouting out this sector for likely worlds to invade. For 'likely' read 'soft and vulnerable.' Our task is to make sure they either don't leave here, or they leave convinced that we are neither soft nor vulnerable and way too much trouble to invade. We win this battle, they go away, we save ourselves a great deal of trouble in the future. We lose, this'll get a hell of a lot worse."
- Captain Sicarius, Ultramarines