{{ImperiumPortal}}{{clear}}{|hspace=5 VSPACE=5 align=right cellpadding=4 cellspacing=4 style="margin:7px; border:1px solid #090909"|colspan=2 align="center"|'''Imperialis Auxilia (Imperial Army)''' |-|align=center colspan=2 style="font-size:85%;font:85%"|[[File:Imperial Army Symbol.jpg|thumb60px]]|-|rightcellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|'''Headquarters'''|Symbol of the Imperial Army{{Fncellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|17}}[[Terra]]|-|cellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|'''Leader'''|cellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|[[ImageLord Commander Militant]]|-|cellpadding=2 cellspacing=1 style="font-size:95%;font:ImperialArmy.jpg95%"|'''Sub-Branches'''|cellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|[[Solar Auxilia]]<br>[[Imperialis Militia]]<br>[[Imperialis Armada]]<br>[[Divisio Aeronautica]]|-|cellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|'''Established'''|cellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|thumb[[Unification Wars]]-era|right-|200pxcellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|A soldier of the Imperial Army{{Fn'''Dissolved'''|cellpadding=2 cellspacing=1 style="font-size:95%;font:95%"|12a}}Post-[[Horus Heresy]]|}The '''Imperial Army''' (also known as the '''Imperialis Auxilia''' in [[High Gothic]]{{Fn|20}}) was the largest military force in the early Imperium, and was founded during the early [[Great Crusade]] to fill the need for more manpower to support the [[Space Marine Legion|Astartes Legions]], and quickly was used to garrison worlds, and to perform sieges, and mass invasions{{Fn|1}}. The '''[[Imperialis Armada]]''' was the fleet subset of the Imperial Army and was subordinate to it, while its aerial warfare branch was known as the [[Divisio Aeronautica]].{{Fn|2x44}}, and both of them These units were in turn subordinate to the [[Space Marines|Astartes]] command structure{{Fn|1}}.The Imperial Army itself was part of the [[Excertus Imperialis]], constituting one of its many divisions.{{Fn|41a}}

The fighting elite of the Imperial Army was the [[Solar Auxilia]], which comprised about 20-25% of the Army's strength by the end of the Great Crusade.{{Fn|21}} The whole strength of the Imperial Army numbered in the many billions.{{Fn|41b}} The Imperial Army also maintained a force of auxiliaries known as the [[Imperialis Militia]].

In the aftermath of the Horus Heresy many , numerous changes were made to the structure of the Imperial armed forces. Many of these changes were made to ensure to that no single individual would ever again be powerful enough ever again to attempt to overthrow the ruling body of the Imperium if he turned traitor. It was during these post-Heresy reforms that the Imperial Army was split into two organisations: the [[Astra Militarum]] and the [[Imperial Navy]]; the link between them was severed. Astra Militarum commanders now have no authority over the Navy personnel transporting them and are forbidden from being able to command a navy naval force{{Fn|2x}}.

The Imperial Army was recruited from each world in the Imperium unless exempted (such as Astartes home worlds, [[Forge World]]s, and planets in the [[Sol System]], though some of the regiments from the [[Unification Wars]] of Terra were allowed to fight in the Great Crusade), but the size of the tithed forces was dependent on the population of the planet, and Imperial administrators determined the amount of soldiers and war materiel demanded{{Fn|1}}. If all else failed or in times of desperation, the Imperial Army would utilize utilise inducted levy militia, troops with little to no training and poor equipment.{{Fn|2243}}

The best equipped and trained regular Imperial Army troops were known as '''[[Imperialis Militia Grenadiers|Grenadiers]]'''.{{Fn|22}} The fighting elite, made up of 20-25%, were known as the [[Solar Auxilia]]

Overall command of the Imperial Army was overseen by two [[Lord Militant]]s who at the end of the [[Great Crusade]] were [[Tabor Ludovicia]] and [[Haldane Ma'lon]].{{Fn|24}} Like the Imperial Guard of the 41st Millennium, the Imperial Army relied on the [[Departmento Munitorum]] for administrative duties.{{Fn|25}} This in turn answered to the [[Officio Militaris]], an umbrella organization organisation including all of the many mortal soldiers, laborers, labourers and bureaucrats dedicated to the Great Crusade. However, operational command for the Imperial Army fell to the [[War Council]].{{Fn|34}}

The largest single organisational unit in Imperial Army was broadly organised into three groupings. The First Echelon consisted of around 25% of the Imperial Army , was a leading edge of the [[Expedition FleetGreat Crusade]] and fought in direct support of the [[Legiones Astartes]] or independently in areas where [[Space Marine]]s could not be spared. These included the famed [[Solar Auxilia]] as well as other elite [[Regiments]] such as the [[Old Hundred]]. Upon achieving victory, each the First Echelon would leave the warzone with the rest of which was controlled by a the [[Lord Commander#Imperial Army|Lord CommanderExpeditionary Fleet]] unless an Astartes officer was attached{{Fn|3}}. By The Second Echelon, a strategic reserve formation of regular army troops, would then begin its duties in the time form of the Ullanor campaign mopping up, occupation and the inauguration overseeing compliance of Warmaster Horus, there were 4the conquered world into the new Imperium. When necessary,659 Primary Expedition Fleets (with 372 of those these troops would also be used in refit at the time) protracted sieges and more than sixty thousand Secondary Expedition Fleetsanti-insurgency operations.{{Fn|442}}. Expedition Fleets each had several ships and a large amount of Army personnel for ground warfare.

For garrisoning Only once a world was declared fully compliant would the Third Echelon, or [[Imperialis Militia]], be deployed. These troops often were formed for a core of former Second Echelon troops as well as many new locally raised personnel. The duty of the Third Echelon was to combat piracy, civil unrest and to act as the first line of defense against any new threats that may emerge despite often being woefully outmatched against more formidable enemies. Unlike the first and occupying worldssecond echelons, these troops had no standardisation with regards to equipment, technology levels or training. Rarely deployed off-world and not particularly loyal to the [[Imperial Truth]], during the subsequent [[Horus Heresy]] Third Echelon troops were often used as cannon fodder, especially by the Traitor Legions.{{Fn|42}} [[File:Horus Heresy Collected Visions - Discipline Master.jpg|thumb|120px|right|A [[Discipline Master]].{{Fn|12c}}]]The largest single organisational unit in the Imperial Army organized local was the [[Expedition Fleet]], each of which was controlled by a [[Lord Commander#Imperial Army|Lord Commander]] unless an Astartes officer was attached{{Fn|3}}. By the time of the Ullanor campaign and the inauguration of Warmaster Horus, there were 4,659 Primary Expedition Fleets (with 372 of those in refit at the time) and more than sixty thousand Secondary Expedition Fleets{{Fn|4}}. Expedition Fleets each had hundreds of thousands of ships and a large amount of Army personnel for ground warfare, the entirety of the Imperialis MilitiaArmada transporting and supplying many billions of troops.{{Fn|41b}} Imperial Army personnel were watched over by [[Discipline Master]]s, precursors of the modern [[Commissar]] unitss.{{Fn|12c}}

[[Image:Fasadian.jpg|thumb|right|Imperial Army troops of the [[Fasadian Heavy Infantry]] ]]The largest ''permanent'' organisational unit during the Horus Heresy for the Imperial Army was the '''regiment''', and to take a typical example, regiments could be divided into three or more '''battalions''', with each battalion made up of two or more '''companies''' and '''Platoons''', with additional support units attached at the battalion and regimental level{{Fn|6}}.

The organisation of individual regiments varied immensely because of the massive lack of standardization standardisation within the Imperial Army{{Fn|2x}}. Expedition Fleets were only equipped with a portion of their supply needs, and were expected to re-supply themselves from conquered worlds. These issues were partially resolved with the [[Council of Terra]]'s introduction of the [[Departmento Munitorum]]{{Fn|5}}. The Munitorum originally existed as the Corps Logisticae, a division of naval administration, but was made into a full Departmento shortly before the [[Ullanor Crusade]].{{Fn|15}}

Regiments were usually assigned to individual ships, with Army personnel commanding both elements.{{Fn|2a}} In the fleet, the highest rank was the '''Master of the Fleet''', who was under the authority of the Lord Commander or Astartes officer in the Expedition Fleet. Other common ranks include included Shipmaster (in control of a ship), Executive Officer (second in command){{Fn|4}}, First Master{{Fn|11a}} and Master (other ship officers){{Fn|11b}}. Some fleets, like the [[Saturnine Fleet]], retained their old ranks from before the Unification Wars. [[Image:Fasadian.jpg|thumb|right|Imperial Army troops of the [[Fasadian Heavy Infantry]] ]]

{{Main|Astra Militarum Vehicles_#Retired}}The Imperial Army of the [[Great Crusade]] was much more well-equipped than the [[Astra Militarum]] of [[M41|the 41st Millennia]].{{Fn|13x}} Vehicles that are considered rare or lost technology in M41 were common, such as the [[Testudo]], [[Dracosan]], [[Aurox]], [[Gorgon Armoured Assault Transport|Gorgon]], [[Carnodon (Tank)|Carnodon]], [[Malcador Heavy Tank|Malcador]], [[Leman Russ Incinerator]], [[Leman Russ Vanquisher]]{{Fn|13a}}, [[Leman Russ Executioner]]{{Fn|13b}}, and [[Destroyer Tank Hunter]]{{Fn|13c}}, or [[Scurrier]]{{Fn|3}}. Advanced walkers such as the [[Hermes Light Sentinel]] and [[Aethon Heavy Sentinel]] were fielded{{Fn|37}}. Entire divisions were equipped with [[Baneblade]] and [[Stormhammer]] Super-Heavy Tanks and [[Valdor (Heavy Tank)|Valdor Heavy Tank]]s{{Fn|14}} and fleets were equipped with multitudes of [[Battleship]]s and [[Grand Cruiser]]s, all now considered a rarity.{{Fn|13d}} In the ten thousand years since the Great Crusade and Horus Heresy, [[STC]]s have been lost, [[Forge World]]s destroyed, and the technology has been treated with far more superstition by the [[Adeptus Mechanicus]].{{Fn|13e}}{{Fn|22}}

*[[Addaba Free Corps]] — Defected to [[Horus]] during the [[Siege of Terra]].{{Fn|2727c}}*[[Antioch Miles Vesperi]]{{Fn|2929a}}

*[[Angkorian Dragoons]] — Part of the [[Old Hundred]].{{Fn|27a27b}}

*[[Golden Hegera]] — Part of the [[Old Hundred]].{{Fn|27a27b}}*[[Harkon Geno]].{{Fn|40}}

*[[Hundred and Fifth Tercio Upland Grenadiers]]{{Fn|2929a}}

*[[Kimmerine Corps Bellum]]{{Fn|2929a}}

*{{Main|Expedition Fleet}}

*[[Saul Niborran]] — High Primary Solar [[General]]{{Fn|2929a}}*[[Konas Burr]] — [[Militant General]]{{Fn|2929a}}

*[[Aldana Agathe]] — Marshal.{{Fn|2929a}}

*[[Yennu Egwu]] — [[General]], defects to [[Horus]]{{Fn|2727c}}

*[[Clement Brohn]] — Militant [[Colonel]] Auxilia{{Fn|2929a}}

*[[Maigraut]] — [[Colonel]].{{Fn|27b27a}}

*[[Aevos Jovian]] — [[Medic|Medicae]] ae Officer

*[[Ollanius Piers]] — [[Corporal]].{{Fn|29a29b}}

*[[Imperial AuxiliariesLegiones Auxilia]]

{{CiteCitation issues}}*{{Endn|1}}: [[Horus Heresy: Visions of Darkness]], {{Cite ThisMarker End}}

**{{Endn|2x}}: {{Cite ThisMarker End}}*{{Endn|3}}: [[Legion (Novel)]], {{Cite This}}Part 1: Chapter 10*{{Endn|4}}: [[Horus Rising (Novel)]], {{Cite ThisMarker End}}

*{{Endn|6}}: [[White Dwarf 125 (UK)]], {{Cite ThisMarker End}}*{{Endn|7}}: [[Fulgrim (Novel)]], {{Cite ThisMarker End}}*{{Endn|8}}: [[Battle for the Abyss (Novel)]], {{Cite ThisMarker End}}

**{{Endn|13x}}: {{Cite ThisMarker End}}

*{{Endn|27}}: [[The First Wall (Novel)]] :**{{Endn|27a}}: Chapter 3320**{{Endn|27a27b}}: Chapter 25**{{Endn|27b27c}}: Chapter 2033

*{{Endn|29}}: [[Saturnine (Novel)]] :**{{Endn|29a}}: Part 1 Chapters 1-2**{{Endn|29a29b}}: Part 2 chapter 5

*{{Endn|31}}: [[Horus Heresy (game system)]] - :**{{Endn|31a}}: Andrei Ornatov card**{{Endn|31a}}: {{Cite Marker End}}

*{{Endn|36}}: [[The End and the Death: Volume I (Novel)]]{{CME}}*{{Endn|37}}: [https://www.warhammer-community.com/2024/02/01/heresy-thursday-scout-fast-and-strike-hard-with-the-hot-rod-sentinel-of-the-solar-auxilia/ Warhammer Community: Heresy Thursday – Scout Fast and Strike Hard with the Hot Rod Sentinel of the Solar Auxilia (posted 01/02/2024)] ''(last accessed 01/02/2024)''*{{Endn|38}}: [[Codex: Astra Militarum (9th Edition)]], pg. 9 - ''A Glorious Tapestry''*{{Endn|39}}: [[Of Honour and Iron (Novel)]], ''Pretext: The Thirty-First Millennium''*{{Endn|40}}: [[The Purge (Novella)]], Chapter 7*41: [[Horus Heresy: Age Of Darkness 2nd Edition Rulebook]]:**{{Endn|41a}}: pg. 24**{{Endn|41b}}: pg. 25*{{Endn|42}}: [[Horus Heresy: Age of Darkness 3rd Edition Rulebook]], pg. 27*{{Endn|43}}: [[Macragge's Honour (Graphic Novel)]], Dramatis Personae*{{Endn|44}}: [[Horus Heresy: Aeronautica Imperialis]], pg. 91

[[Category:Imperial Army| ]]