Changes

*'''Armistos'''

These officers were charged with maintaining, categorizing, requisitioning, and dispensing the vast arsenals of a Space Marine Legion. Beyond this, they worked to improve the weaponry of the Legion and ran simulations and field augmented tests. The skill required of an Armistos was much sought after by the Master of the Arsenal, and the most prized candidates were those of level temperament who are not apt to charge into the fray but are capable of supporting and supplying their Battle-Brothers without desire for aggrandizement.{{Fn|7d}}

*'''Delegatus'''

These officers were tasked with specific missions by a Legion's high command, allowing them to act with full authority. As such, they could mobilize the Legion's resources, deploy assets independently, and perform vital strategic missions.{{Fn|6a}}

*'''Esoterist'''

Members of the Librarius who returned to their studies with or without the blessing of their Primarch and delved into forbidden lore that saw common use on the battlefield.{{Fn|1a}}

*'''Forge Lord'''

Masters of the machine and foundry, Forge Lords are the most experienced and skilful of the Legion’s Techmarines. These warrior-smiths are skilled battle-leaders as much as they are artisans of war, and are often appointed to the command of Legion detachments comprised largely of tanks and armoured vehicles or battle-automata, as well as serving as stewards to a Legion’s Dreadnoughts.{{Fn|7a}}

*'''Herald'''

These officers carried the official banner of their lords, be they Primarch or otherwise. They often oversaw and undertook the interests of their Legions in key missions, acting most commonly as emissaries{{Fn|7c}}

*'''Master of Signals'''

The Master of Signals is a strategic and communications specialist capable of interpreting and directing the flow of battle around them, and calling in support strikes from distant batteries and orbiting vessels.{{Fn|7b}}

*'''Mortificator'''

These specialized [[Techmarine]]s were responsible for their Legion's [[Dreadnought]]s. They showed a near fanatical devotion to their charge of managing the Legion's honored dead, and in some cases went so far as to contravene the tenets of the Cult Mechanicus adopted by the Masters of the Forge. A Mortificator's primary duties included the protection during slumber and rousing during war of the Legion's Dreadnoughts, and when necessary, extends to the controlling of those Dreadnoughts too asleep or too choleric to be considered wholly sane.{{Fn|1c}}

*'''Pathfinder'''

Within the ranks of the Legions at the time of the outbreak of the Horus Heresy there were few remaining [[Space Marine Scout|Scout]] cohorts, with most companies equipped with scout armour long since reassigned to [[Reconnaissance Marine]] detachments. Those few that remain are often veterans of over a century of war in the most hostile terrain known to humanity, and the last Pathfinders are the unchallenged experts on combat in this field.{{Fn|7c}}

*'''Primus Medicae'''

High officers of the Legion [[Apothecarion]], the primus medicae of a Legion hold the onerous duties of both ensuring the battle-readiness and physical wellbeing of their battle-brothers. This is an authority which none but a Primarch or his chosen deputy can overrule, and such warriors are dedicated to preserving the gene-seed of the Legion from loss or contamination at any cost, even that of their lives{{Fn|7a}}

*'''Primus Nullificator'''

These warriors were pioneers of early attempts by the Legiones Astartes to counter the Daemonic once the spawn of the Warp began to appear in number during the Heresy. They sanctioned research into esoteric artefacts and weapons and openly sought prohibited lore in the hope that it would provide wisdom capable of combating the Daemonic.{{Fn|1b}}

*'''Siege Breaker'''

The wreckers of cities and fortresses, Siege Breakers were officers whose specialty is applied to the destruction of strategic targets. They were often placed in command of armoured spearhead assaults and frontline artillery units, preferring to closely observe their work rather than sat back behind the rear{{Fn|7d}}

*'''Warmonger'''

These Centurions were hardened commanders who were much respected for their willingness to heroically throw themselves and their men into the toughest resistance, and are entrusted to prosecute shock assaults which crush the foe in a single action.{{Fn|1a}}