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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. These issues were partially resolved with the Council of Terra‘s introduction of the Departmento Munitorum. Expedition Fleets were only equipped with a portion of their supply needs, and were expected to re-supply themselves from conquered worlds. The organisation of individual regiments varied immensely because of the massive lack of standardization within the Imperial Army.
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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. Expedition Fleets each had several ships and a large amount of Army personnel for ground warfare.įor garrisoning and occupying worlds, the Imperial Army organized local Imperialis Militia units. 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. The largest single organisational unit in the Imperial Army was the Expedition Fleet, each of which was controlled by a Lord Commander unless an Astartes officer was attached. Thousands of Army commanders took it upon themselves to carve themselves their own empires, with no loyalty to Horus or the Emperor, and it was centuries before the Imperium was reforged. The Imperial Army’s subordination to the Astartes Legions led to the Imperial Army tearing itself apart in the Horus Heresy, when half of the legions rebelled against the Emperor, and took their Army regiments with them. Imperial Army trooper of the Solar Auxilia Initially used as garrison forces, they were quickly pushed to the forefront of the Crusade. It is out of these forces that the Imperial Army was first formed. When the Emperor left Terra on the Great Crusade, it is said that he would expect the inhabitants of the worlds he conquered to maintain defences and armed forces for their own safety, against internal rebellion and external invasion similar to the role of Planetary Defence Forces in the 41st millennium. These surviving units in time became referred to as the Old Hundred, and formed the initial nucleus of human soldiery at the very beginning of the Great Crusade. The genus of the armed force that was to become the Imperial Army was on Terra, in the form of the few Strife-era military formations that the Emperor allowed to continue in his service after the end of the Unification Wars. Symbol of the Imperial Army Early Imperial Army History
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The Imperial Army also maintained a force of auxiliaries known as the Imperialis Militia. 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. The Imper ialis Armada was the fleet subset of the Imperial Army and was subordinate to it, and both of them were subordinate to the Astartes command structure. The Imperial Army (also known as the Imperialis Auxilia in High Gothic ) 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 Astartes Legions, and quickly was used to garrison worlds, perform sieges, and mass invasions. Once upon a time the Armored fist of the Emperor was even more feared than the Astra Militarum of today.
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