Changes

During the peak of the [[Horus_heresy#The_Siege_of_Terra_and_the_aftermath_of_the_Heresy|Siege of the Imperial Palace]], the [[Imperial Fists]] and [[Rogal Dorn]] used the Sky Fortress to make a massive move to reinforce the Palace defenses after the traitor forces broke through the Palace walls.  After facilitating the redeployment of Dorn and his Imperial Fists, [[Titan| traitor Titans]] targeted the great ship, destroying it. The crew of the Sky Fortress piloted its final descent into [[Horus]]'s forces below. The impact detonated the ship's plasma reactors, creating a crater three kilometers across, inflicting heavy fatalities and searing eyes with the flash of its explosion.¹