Editing MidHammer 40,000: SM Chapters (section)

====Codex Sections====
The Corpus is divided into 4 parts.
;Codex Velladucti
:"The Book of War-waging"
:*The Book of Tactics and Generalship. This section consists mostly of the Work of Roboute Gulliman, but also features notable sections from Horus. Magnus, Fulgrim, and Khan also have made some contributions.
:*Contains guidelines for proper military tactics, effective strategies, guidelines on management of supplylines, and other things that would be useful guidelines for a chapter or company to use the codex astartes.
:*Includes advice and strategic guidelines for Joint Chapter and Joint Legion missions, as well as guidelines on Utilizing Imperial Gaurd divisions in joint missions.
:*It also includes analysis of major battles of the Great Crusade, with commentaries by the Primarchs who led them.
;Codex Chronopacis
:"The Book of Peace-Time"
:*Provides Guidelines for managing the chapter when a Space Marine Chapter and legion is not at war. 
:*It offers advise on training schedules, fortress maintenance, managing Astarte morale and discipline, and other chapter management.
:*Codex Chronopacis is probably one of the Few Sections in which Vulkan makes hefty contributions on advising Astartes-Civilian relations, and the ways in which the space marine legion can contribute to the well-being of their subjects.
;Codex Astartes
:"The Book of The Soldier"
:*Perhaps the most famous book, and the one that nearly every Space Marine has read.
::*So much so, that This particular Section has become a Metonym for the entire Corpus, despite being the smallest section.
:*The Codex Astartes contains rules and guidelines for the behavior of the Adeptus Astartes on a personal level. 
:*Behavior towards superiors, subordinates, Astartes of different chapters, as well as with Military and civilians are all covered here.
:*The Codex Astartes also provides guidelines on warding oneself against the forces of chaos and identifying signs of corruption.
::*This section was written primarily by Magnus the Red. However Leman Russ has some rather impassioned contributions as well.
;Appendix Astartes
:*Contains rules and guidelines for the creation of new Space Marine Chapters
:*The Different Indexes and Regulae are located here.

;Codex Regulae (Apochryphal)
:The "Standard Code" or "The Code of The Legions"
*An additional Section composed by Horus 
*Dismissively called "Codex Nebulae" (The Wishy-Washy or Irrelevant Code), by Astartes Chapters and most Jura Codice. 
*Codex Regulae offers advice on the management of legions.
*However, because most Legions are still led by their Primarch (who usually have their own ideas), the Codex is for the most part ignored.
*Very few Legions or Chapters include this in their codexes.

The "Codex Astartes" as usually carried by individual space marines usually consists of:
# Major selections from "The Codex Astartes"
# Heavily curated selections from Codex Chronopacis regarding individual behavior and dispute management
:Selections usually selected based on the Position of the Astartes as well as the Chapter Master's preference.
# Heavily curated selections from Codex Velladucti
:Usually selected based on the leadership of the chapter based on tactical preferences.
#The Relevent Index and Regulae pertaining to the chapter.