Ah yes the all argument. Wrong. Dont be obnoxious please. They were on the Grand Crusade before the heresy, now they are barely holding the Empire defending it from predations from traitors xenos and heretics. Few Chapter BT forefront among them continue to push the fight towards the enemies of mankind as the Emperor intended. Their eternal Crusade. The ALL argument falls short, when some are guarding the eye of terror, others, covering up their little secrets and another ones are managing their small empire.