By far the most aggressive of the Space Marine Legions to turn against the Emperor during the Horus Heresy, the World Eaters preferred style of fighting is to hurtle forwards axes and chainswords swinging. Without stopping they churn through enemy forces like a knife through butter, only relenting when the enemy has been utterly decimated. They serve the Choas God Khorne in their ways, and they can be constantly heard shouting in his honour! Blood for the Blood God!