The Final Compliance of Sixty-Three Fourteen is the nineteenth short story published in the Horus Heresy that was not originally part of an anthology novel. The Final Compliance of Sixty-Three Fourteen was the first item released as part of the Black Library's 2014 Advent Calender. It is also now included in the Eye of Terra anthology novel.
As Horus grinds the Imperium beneath his boot, emissaries from the XVI Legion return to worlds sworn to the Warmaster during the Great Crusade to have them renew their fealty. With the Sons of Horus already at battle readiness over the world of Sixty-Three Fourteen, a grim decision must be made...
- The Final Compliance of Sixty-Three Fourteen (Short Story) by Guy Haley