A '''Codex Chapter''' of [[Space Marines]] tends to follow the strict organisation and doctrines as laid in the [[Codex Astartes]]. The [[Ultramarines]] are the quintessential example, and most of their Successor [[Chapters]] follow their structure. Other Chapters, like the [[Dark Angels]], have relatively minor variations in their organization organisation and ways of fighting. Yet others, like the [[Space Wolves]], simply ignore the organization organisation presented in the Codex Astartes and follow their own ways.