WH40k Canon Timeline of the Hereticus Astartes

This page covers the bloodiest and most importants battles of the Long War, waged by the Traitor Legions and Renegade Chapters in the service of the Dark Gods. Presented here, are the major events of the Hereticus Astartes's, more commonly known as Chaos Space Marines, quest for slaughter, destruction and revenge. Many of this events are of great importance to the forces of Chaos at large, meaning they will inevitably affect your own Chaos Homebrews in one way or another. Otherwise, they make for great inspiration in writing your own deeds and campaigns.

Note : All the dates presented here are meant to be the most precise possible, but many of them were lost through History, or are even contradictory between many sources. The contributors of these archive have the best efforts to provide the best timeline possible.

The Age of Betrayal : M31
The Spiritual rot spread by Warmaster Horus takes roots within the Legiones Astartes, and ten thousands years of war is put in motion.

The Age of Retribution : M32-M39
Swearing to suceed where his forefather failed, Abaddon takes up the mantle of Warmaster and begins the Long War.

The Age of Apotheosis : M40-M41
As the years pass, the Imperium weakens and crumble, his defenders strechted to every corners of the Galaxy by countless conflicts. The slaughters and offerings pleases the Dark Gods, who offers boons, mutations and even Daemonhood to their servants.

The Age of the Rift : M41-...
The Great Rift, Abbadon's greatest achievements, tears through the Galaxy and the Imperium. Billions are killed or corrupted by its gloom, and thousands of Chaos Space Marines pillages, raids and conquer during the Noctis Aeterna, but many are lost during Guilliman's great Indomitus Crusade. Nevertheless, the Long War is near its end.