The Howling

The Howling

Name : The Howling
Dates: Unkown - 401.M34
Marshal:
Chaplain:
Champion:
Forces:
Unknown Black Templar Forces but large! 1300 planterary systems!!

Friendly Forces:

Enemy Forces:
Catelexis Heresy

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Overview:Black Templar Space Marines end the Catelexis Heresy by executing the Cacodominus, an alien cyborg whose formidable psychic presence allowed it to control the population of thirteen hundred planetary systems. The Cacodominus' death scream echoes and amplifies through the Warp, burning out the minds of a billion astropaths and distorting the signal of the Astronomican. Millions upon millions of ships are lost in the resulting upheavel and entire sub-sectors slide into barbarism without the dictates of the Adeptus Terra to guide them.

Overview:
Non-Canon Info
This would be where the author and authors could insert theories, ideas, and flesh out sparse information.

Source: 40k Rulebook 5th Ed (page 124)

Notes: Considering the size of the Heresy (1300 planetary systems) I would presume that the Crusade would have taken quite some time and would have involved a huge number of Marines, no other Chapter has been mentioned in the fluff, just Black Templar.

I also think that the ending of this crusade and the collateral damage would be an ideal chance to display the Templars attitude of getting the job done, no matter the cost. They needed to end the Heresy, so they killed the Cacodominus, once that was done, they walked away, doesnt matter that the entire portion of galaxy then collapsed and billions of innocents died.... they stopped the Heresy!