The Space Marines Codex Astartes – origins and history - Wargamer
https://www.wargamer.com/warhammer-40k/space-marines-codex-astartes
WEBOct 24, 2023 · The Codex Astartes is an organisational and tactical manual that dictates the composition, operation, and tactical doctrines of Space Marine Chapters. Roboute Guilliman, Primarch of the Ultramarines, wrote the Codex Astartes shortly after the Horus Heresy, and it has remained in use for ten millennia since.
DA: 7 PA: 43 MOZ Rank: 66