Editing Legiones Astartes (Hektor Heresy) (section)

==Doctrine and Reforms==
Much of the discipline and organisation of the early Legions owed greatly to the ancient and proven Terran patterns of strategy, hierarchy and function as laid down in the revered texts of the Principia Belicosa of Roma and Krom's fragmentary New Model that had survived in the hands of the Old Earth tyrants down the blood-stained generations. To these venerable treatises the Emperor and his commanders had added their own genius and created a sturdy but adaptable strategic framework that spoke to the fundamental strengths and superhuman abilities of the Legionaries themselves.

Following the disaster of the Hektor Heresy and the Imperial counter-offensive of the Great Scouring, [[Gaspard Lumey]] and [[Arelex Orannis]] presided over a great reorganisation of the Loyalist Space Marines into smaller rapid strike units of a thousand Astartes. These Successor Chapters to the old Legions would form an integral part of the Reformed Imperium's defences.