The Gates of Terra is the eighth short story published in the Horus Heresy that was not originally part of an anthology novel. It was first published as part of the Games Day 2012 Chapbook in France and was later released separately as an e-book. It is also included in The Silent War anthology novel.
As the Heresy spreads across the galaxy and confusion reigns, only one thing is certain: Horus and his Traitor Legions will eventually strike at Terra. But he will not find it unguarded –- the Ardent Reef, an encircling ring of gun bastions and asteroid bases, is but one amongst many such lines of defence. Captain Arcadese of the Ultramarines finds himself in command of a host of his Battle-Brothers, as the Renegade Warmaster Horus' fleet launches its final assault on the Throneworld. Will he hold the line even in the face of almost certain death, or will his own loyalty waver in those final moments?
- The Gates of Terra (Short Story) by Nick Kyme