Black Legion

The  are a chapter of the Chaos Space Marines in Eternal Crusade.

Summary
The Black Legion, under their original title as the Sons of Horus, was the greatest of the nine First Founding Legions of Space Marines that turned traitor during the Horus Heresy in the early 31st Millennium. They became the primary instrument of their Primarch to overthrow the Emperor of Mankind in the name of Chaos.

Now led by Warmaster Abaddon from a nebulae at the edge of the Eye of Terror, the Black Legion exemplify the millennia of hatred and resentment built up by the Chaos Space Marines, and fight to bring about the downfall of humanity.