These Trolls travel land and sea in an eternal search for their next war. The Host of Battle—for they have no other name for themselves—is part mercenary army, part ethnicity.
A loose organization of heros who have toppled regimes, the Brothers of Dusk and Dawn have given their lives to the Gods of Chaos, becoming potent agents of change through out the known worlds…
The Twilight Tunnels, the Imperial Gate system, was the backbones of the Imperium. The ability to travel almost anywhere via the Twilight Tunnels, allowing for near unlimited trade for little money, quick communication (any message anywhere nearly instantly (or within 3 days for the hinterlands), and easy personal travel. The Order was charged with the creation, maintance, and defense of The Gate System.
The Guild of Messengers is one of the few guilds/ orders accepted in every civilized and many near civilized lands. The Messengers know only their own special language and script (though they might know how to speak A dozen or so languages, they are prohibited to be literate in any other tongue). They are the tool of civilization, allowing for communication to be passed across the world (and the occasional small item as well).
Arakis's zombie problem went largely ignored, because it was believed that the Shai-Hulud (sand worms) would effectively dispose of the undead walkers. Unfortunately the problem grew until the roving herds of sunburnt ghouls threatened the flow of spice. While observing one of the great reanimated masses over take a Harvester from the safety of an ornithopter, an Imperial Zoologists noted that the sand caked flesh eating revenants walked entirely without rhythm.
Shortly after receiving this report the Bene Gesserits claimed to have a solution to Arakis's hellish resurrections. They asserted to the agents of the great houses that the worms could be drawn to the walkers using an ancient sonic weapon. According to the sisters, exposing the zombies to an antediluvian ballad composed by the great master M. Jackson would force them to step in time.