Second Defence of Morgen Schwach

The Second Defence of Morgen Schwach was the second notable Imperial defensive campaign carried out by the Mordekaisers Space Marine Chapter against invading Forces of Chaos, when their Chapter's starport of Morgen Schwach came under assault.

Background
Following the destruction of the vital fortress world of Cadia by the Chaos forces of Abaddon the Despoiler, this resulted in the collapse of the last remaining defences keeping the notorious tear in reality, the Eye of Terror, to finally expand beyond its normal size. This resulted in a galaxy-wide tear in reality, known as the [[:w:c:warhammer40k:Cicatrix Maledictum|Cicatrix Maledictum, the extended from the Segmentum Obscurus to the Eastern Fringe of the Segmentum Ultima. With the veil of reality torn asunder, this allowed the creatures of the Immaterium as well as the Traitor Legions and various Chaos Warbands to pour into realspace. Strife, insurrection and slaughter soon erupted on thousands of worlds across the width and breadth of the galaxy. The Mordekaisers were besieged by a sudden onslaught of Chaos forces when the Warp Rift of Malefactus swelled wide as a result of the Great Rift. The Chapter was almost overwhelmed when the newly resurrected Ultramarines Primarch Roboute Guilliman and the forces of his Indomitus Crusade arrived to aid the beleaguered Chapter. After defeating the Forces of Chaos, Guilliman bestowed the Mordekaisers with a profound gift from the Emperor, in the form of the newly revealed Primaris Space Marines to rebuild the numbers of the sorely depleted Chapter, a gift the Chapter did not readily accept.