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The Void Tridents were among the Primaris Space Marine Chapters created during the Ultima Founding, at the direct order of Roboute Guilliman, and were created during the Indomitus Crusade. Recruited from the Ocean World of Talassar, the Void Tridents follow the naval traditions of the Realm of Ultramar. They are experts in boarding actions and ship-to-ship warfare, though under Lord Commodore Theodro Vethrus, they have also proven themselves in planetstrike operations.
The Void Tridents are one of the Chapters assigned by Guilliman to protect the reformed Realm of Ultramar.