"Warmaster" was a title often given to generals of House during the time of the Faufreluches. The title was often used as a reference to military leaders who had established a reputation in battle, and who could instruct others in the art of war.

Gurney Halleck was regarded as a Warmaster for House Atreides during the rule of Padisha Emperor Shaddam Corrino IV. He was responsible for training and leading armies, as well as instructing the Ducal Heir Paul Atreides in warfare and combat.

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