The Endurance was an Imperial Battleship that served as the flagship of Mortarion during the Great Crusade and subsequent Horus Heresy. It led Death Guard operations at the Battle of Isstvan III and the Drop Site Massacre. It later engaged the White Scars above Prospero and Catallus.
The Endurance would survive the Heresy and in the subsequent millenia, it became heavily corrupted by the power of Nurgle and even became home to a piece of the Chaos God's Garden. After the Thirteenth Black Crusade, the Battleship once again became Mortarion's flagship, when the Daemon Primarch invaded the Realm of Ultramar.
- 1: The Flight of the Eisenstein (Novel), Chapter One, pgs. 6-23
- 2: Collected Visions, pg. 32
- 3: The Horus Heresy Book One - Betrayal, pg. 137
- 4: Scars (Novel)[Needs Citation]
- 5: The Path of Heaven (Novel) Chapter 21
- 6: Dark Imperium (Novel) by Guy Haley, Chapter 19