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Third Tyrannic War


  • The Ecclesiarchial Wars
  • Ultima War
Fourth Tyrannic War




Segmentums Pacificus, Obscurus and Ultima


  • Allied victory
    • More than a half of Segmentum Pacificus is devoured
    • Tau Empire is dissolved
    • Lord Commander Roboute Guiliman sacrificed himself to destroy the First Greater Hive Fleet

The Triumvirate

  • Imperium of Man
  • United Necrons
  • United Eldar Craftworlds


Other Combatants (not allied)

  • Orks
  • Chaos
  • Dark Eldars
  • Tau
  • Imperium of Man
    • Lord Commander of the Imperium Roboute Guiliman
  • Necrons
    • Silent King
  • Orks
  • Chaos
    • Abbadon the Despoiler
    • Daemon Primarchs
    • Variuos other Chaos Lords
  • Dark Eldar
  • Tau
    • Commander Shadowsun
    • Various Commanders
  • Humans
    • Trillions of human armed forces
    • Hundreds of thousands of Adeptus Astartes
  • Eldar Craftworlds
    • Two dozen Craftworlds
  • Necrons
    • All Nercon forces

Greater Hive Bahamut

  • Uncountable forces
  • Orks
  • Chaos
  • Dark Eldar
  • Tau
  • Humans
    • Trillions of civilians
    • Trillions of human soldiers

Almost all of the Greater Hive Bahamut

  • Almost all Tau
  • Trillions of Orks
  • Trillions of Chaos forces
  • Unknown Dark Eldar Casualties

The Fourth Tyrannic War sometimes called The Great Devouring began during the closing years of the 13th Black Crusade. The Great Devouring was a horrible war for survival to everyone in it and as a result, strange alliances were made.

It has been later theorized by some of the Imperial scholars that it actually saved the Imperium from the 13th Black Crusade when the First Greater Hive Fleet, designated "Bahamut", moved into Segmentum Obscurus and clashed with the Chaos forces around the Eye of Terror.

This war saw the return of the Silent King to the Necrons' power where he united the entire race under his command. Similarly, many Eldar Craftworlds banded together to fight the devouring menace.