Solar Auxilia - The Saturnyne Ordo: In laying out the strategic formulation and pattern of organisation for the Solar Auxilia, the Emperor, in His wisdom, appears to have drawn on two principal sources: the great military forces of the Unification Wars of Terra and the Saturnyne Ordo. Warfare had been the general condition on Terra and its star system for thousands of standard years, and the homeworld of Humanity had seen many great empires rise and fall, and with them great armies and warrior cultures form and meet their destruction.From this crucible of battle, the Emperor drew much that would inform the structure and tactics of all of His armies, and the Solar Auxilia would be no different in this, but it was the highly militarised tech-enclaves of Saturn, whose expertise in void warfare was of peerless temper, that would most greatly inform the nature of the Solar Auxilia.The Polities of Saturn had formed during the Age of Strife; they were a disparate league of independent domains and kingdoms formed from scores of asteroid-enclaves, orbital arcologies and lunar colonies around the gas giant which gave them their name. Over time they had established a common, technologically advanced culture, and although inter-state conflict, competition and vendetta was rife among them, spurred on by survival, they quickly banded together in the face of outside threat, be it the baleful influence of the Mechanicum of Mars, or the horrific privations of xenos and mutant raiders come to plunder the wealth and resources they had so long sought.Their military, combining by far the most powerful fleet in the Sol System prior to Unification and elite armed forces known as the Saturnyne Ordo, had honed the weapons and tactics of void warfare for standard centuries, and until the coming of the Legiones Astartes, in such techniques they were unsurpassed. Many have argued that it was only after the Polities of Saturn joined voluntarily with the Imperium that the Great Crusade truly began, their fleets, orbital shipyards and void expertise fundamental to the speed and scale of the early years of Imperial expansion.The Solar Auxilia were also born in this moment, and the first ten regiments raised, known collectively as the "Saturnyne Rams," were no more or less the Void Hoplites of the Saturnyne Order, reorganised and expanded -- their arms and armament all but unchanged -- and sent out with the first deployments of the as-then only numbered Space Marine Legions to conquer the stars.Soon, more regimental raisings were to follow, with Terra and Luna both providing many newly-raised Solar Auxilia regiments in the same pattern as those of Saturn to meet the strategic demand. These regiments were deployed with the same proven types of weaponry and equipment taken from the Saturnyne prototypes and rendered to the Mechanicum for approval, modification and mass production, including the highly effective and robust Saturnyne void armour, which would serve to single out the Solar Auxilia's particular appearance throughout the Great Crusade.This wargear was supplemented with additional variant weapons and equipment designed with hazardous environment and void use by an unaugmented Human in mind; these became known as "Solar" Pattern, a designation provided by the Mechanicum in keeping with the "Solar" Auxilia forces for which they were intended.