Imperial troops, Tempestus Scions, to be precise, were engaged in an intense firefight with Chaos forces. These hellish soldiers, worshippers of chaos, were clad in grotesque power armour, twisted and tainted by the warp. Bubbling, festering plague, bones and blood, ever-changing curses or symbols of pain, they carried with them the worships of their gods. Meanwhile, the imperial soldiers were simply that. Soldiers. They had no empowering symbol, or taint. They wore their turquoise blue armours and wielded their hellguns, lasguns with an increased accuracy and rate of fire. They showed no fear in the face of this gruesome display, and were holding their own in this battle.