|Age of the Imperium||Age of Rebirth - The Forging - Nova Terra Interregnum - Age of Apostasy - Age of Redemption - The Waning - Time of Ending|
The Waning, was a period of time after the Redemption Crusades, where, due to the exhaustion of the Imperium's military, world after world and system after system fell to Ork invasion, Chaos insurgence, or plain rebellion. Some systems were turned over to Space Marine chapters for direct government.
- 131.M39: The Redemption Crusades
- 392-399.M41: The Macharian Crusades
- M41: The Macharian Heresy
- 143-151.M41: The Gothic War
- 742-745.M41: The Damocles Crusade