The Solar Auxilia is a specialized regiment within the Imperialis Militia and the Imperial Army during the Horus Heresy era of Warhammer 40,000. They are elite troops chosen from the most capable and disciplined soldiers of various worlds across the Imperium. Clad in advanced power armor and equipped with sophisticated weaponry, the Solar Auxilia are known for their professionalism and versatility on the battlefield. They often serve as elite shock troops or as heavy support in critical engagements during the galaxy-spanning conflict of the Horus Heresy.