book
| Series | Horus Heresy #7 |
|---|---|
| Language | English |
| Author | Dan Abnett |
| Year | Black Library, 2016 |
| First Published | 2014 |
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Information was most recently updated Mon May 11 17:32:47 2026
Legion features the “Alpha Legion of Space Marines, the 20th and last to be formed. It is the most secretive, subtle, and inscrutable of all Legions; its deepest secret is the binary nature of its Primarch, who comprises the twins Alpharius and Omegon. The book also highlights the Imperium’s mainstream military force, the Imperial Army, featuring several male and female officers and their units. Another important factor in the novel is The Cabal, a mysterious, ancient interspecies organisation opposed to Chaos – one of the main characters is a human Cabal operative, John Grammaticus. The story takes place over roughly a 6‑month period, about two years before the Heresy starts; it describes the events that eventually lead Alpharius Omegon to support Horus.