The Taninim Crusade was a Crusade undertaken by the Imperium of Man from 678.M37 through 714.M37 intended to regain control of several regions lost along the northwestern fringe of the Segmentum Obscurus. No fewer than eleven Crusading Space Marine Chapters were sent into the forbidding region known as the Taninim Expanse that extends past the outer edge of known Imperial space. Over time, some of the Chapters that were sent to fight in the Taninim Crusade never returned. The Astral Claws, however, were one of the few Chapters able to Crusade throughout the Expanse for more than four decades and return relatively unscathed.