Siege of Hydra Cordatus var addthis_config = {"data_track_addressbar":true};

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The Siege of Hydra Cordatus
The Iron Warriors assault the Citadel of Hydra Cordatus
Date	990's M41
Location	Hydra Cordatus
Outcome	Chaos victory
Combatants
Iron Warriors	383rd Jouran Dragoons Imperial Fists
Commanders
"The Warsmith" First Captain Forrix (d) Captain Kroeger (d) Honsou	Castellan Vauban (d) Lieutenant Colonel Mikhail Leonid Captain Alaric Eshara (d)
Strength
Several Grand Companies Legio Mortis Titans	One Space Marine Company 383rd Jouran Dragoons regiment Titans
Losses/Survivors
Thousands of human soldiers killed. Several hundred Iron Warrior Chaos Space Marines killed. Captains Forrix and Kroeger killed.	Only 1 surviving Guardsman; remainder killed or taken prisoner. Imperial Fists company eradicated.

The Siege of Hydra Cordatus took place in late M41, when a battle-force of the Iron Warriors Chaos Space Marines besieged the Imperial fortress on the Forge World of Hydra Cordatus. The Iron Warriors had been ordered to take the fortress by Abaddon the Despoiler, seeking to recover the hidden store of Imperial Fists' gene-seed inside the fortress, as part of his plans for the impending 13th Black Crusade¹.

Aftermath and Consequences

As the only surviving champion of The Warsmith, Honsou led the remnants of the Grand Company back to Medrengard, where the greater share of the captured gene-seed was delivered to Abaddon. However, Honsou kept a share for his own use, which provoked war with The Warsmith's former allies, Toramino and Berossus, with whom Honsou refused to share his spoils^2a.

Sources

• ¹:Storm of Iron (Novel) by Graham McNeill
• ²:Dead Sky, Black Sun (Novel) by Graham McNeill
  • a: Prologue