The Phaedra Campaign was an Imperial military campaign undertaken by the Blood Angels Chapter of Space Marines on the Shrine World of Sabien, sometime during the 41st Millennium. At that time, Sabien had seen the largest loss of life to the Blood Angels Chapter since the battles of the Horus Heresy, and when the world had finally been pacified at the cost of untold expended lives, the Ecclesiarchy awarded custody of the planet to the Sons of Sanguinius as a reward for their sacrifices. The site of their desperate last stand against the enemies of mankind became a place of pilgrimage. The open space was littered with fallen masonry as far as the eye could see, shattered spars of rusted iron laid down upon the crumbling remains of columns. The remnants of architecture created in the ancient