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What Happened at the Battle of Cadia?

The Battle of Cadia was a massive conflict between the Imperium and the forces of Chaos led by Abaddon the Despoiler. During the battle, the planet Cadia was ultimately destroyed. The fall of Cadia opened a massive Warp rift known as the Great Rift across the galaxy.

QUICK FACTS

ItemDetail
EventBattle of Cadia
Leader of ChaosAbaddon the Despoiler
LocationCadia
OutcomePlanet destroyed
ConsequenceCreation of the Great Rift

EXPLANATION

Cadia was a heavily fortified Imperial world located near the Eye of Terror. It served as a key defensive position against Chaos incursions. During the Thirteenth Black Crusade, Abaddon launched a massive invasion against the planet. Despite fierce resistance from Imperial forces, Chaos eventually destroyed Cadia when a Blackstone Fortress crashed into the planet.

WHY IT MATTERS

The fall of Cadia triggered one of the largest changes in the Warhammer 40K setting. The resulting Warp rift split the galaxy and significantly strengthened Chaos influence across many regions.

RELATED LORE

What Is Chaos in Warhammer 40K
What Is the Current Timeline of Warhammer 40K
What Is the Imperium of Man
What Is the Warp
What Is the Warhammer 40K Timeline

FAQ

Who attacked Cadia?

The Chaos warlord Abaddon led the invasion.

What happened after Cadia was destroyed?

The destruction contributed to the formation of the Great Rift.

author avatar
Baron Von Vault Founder & Gaming Systems Analyst
Baron Von Vault is the founder of the Von Vault Network and creator of D4Dead, BorderlandsHQ, and 40KFAQ. He publishes research-driven analysis of action RPG and looter shooter systems, focusing on progression loops, class mechanics, and endgame design.
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