Crimson Legion

The Crimson Legion is a Traitor Legion of Chaos Space Marines that is the first in infamy, if not in treachery, whose name resounds as a curse throughout the scattered and war-torn realms of Humanity. The Crimson Legion was once one of the 10 First Founding Legions of Space Marines who turned Traitor to the Imperium during the Sanguinian Heresy in the early 31st Millennium. The Crimson Legion, at that time still known as the Blood Angels, became the primary instrument of its primarch, the Warmaster Sanguinius, to overthrow the Emperor of Mankind and seize control of the Imperium in the name of Chaos.