The Iron Warriors are a faction from the science fiction universe of Warhammer 40,000, created by Games Workshop. They are known for their expertise in siege warfare and fortifications, often employing heavy artillery and advanced technology. Originally loyal to the Emperor of Mankind, they turned traitor during the Horus Heresy, a galaxy-wide civil war. As a Chaos Space Marine Legion, the Iron Warriors are marked by their grim determination and relentless pursuit of victory. They are often depicted with a metallic, industrial aesthetic, reflecting their focus on machinery and war. Their leader, Perturabo, is a master tactician and a symbol of their relentless nature.