Obscuran Uprising

From Lexicanum

The Obscuran Uprisings were led by the Free Council of Hannedra II in the late 35th millennium.

The Sons of Vengeance fought for the Imperium of Man during the first part of the Obscuran Uprisings (Late M34). But after the fighting against the Free Council of Hannedra II, they became drunk with power. They crushed the rebellion in the name of the Emperor, but then proceeded to loot and slaughter indiscriminately. They further took their campaign to the neighboring system of Laskaria. By the time the Lords of Terra repsonded, the Sons and the Silver Guards had become over a dozen warbands and threatened 14 systems.

Sources

• *Codex: Chaos Space Marines (4th Edition) p.17-18, 24