Codex Astartes

The Codex Astartes is a mighty tome, written by Roboute Guilliman to prevent another Heresy. This text became the conerstone of the Imperium.

There were many topics, all of them showed Guilliman's formidable intelligence and vast wisdom. The most contreversial and yet most adhered to of the topics and decrees in the Codex Astartes is that the legions be broken down into smaller organisations known as chapters. The breaking up of the legioons into chapters was known as the seocond founding.

However one legion has never been broken down into chapters and that is the Space Wolves. They have continued to order their forces in great companies.