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[[Image:TriplexMap.jpg|thumb|right|250px|Triplex holdings{{Fn|1a1b}}]]The '''Triplex''' were a powerful empire of three [[Imperial]] [[Forge World]]s during the [[Great Crusade]] and [[Horus Heresy]]. Located in the [[Eastern Fringe]], they consisted of the worlds of [[Triplex Phall]], [[Galatia]], and [[Thule (Planet)|Thule]].{{Fn|11a}}

By the time of the Heresy it was one of the industrial hubs in the [[Imperium]] and had created its own small empire within the Eastern Fringe alongside the [[Legio Victorum]] and several hundred [[Taghmata]] Regiments.{{Fn|1b|1c}}

During the Horus Heresy the region supplied large amounts of weaponry to [[Rogal Dorn]], leading it to be attacked by the [[Night Lords]] during the [[Thramas Crusade]].{{Fn|11a}} They initiatlly initially resisted the traitors, but most ended up surrendering to the [[Warmaster]] and turning their industry to his cause. This proved to be a costly mistake when the [[Dark Angels]] arrived.{{Fn|1a1b}}

*{{Endn|1}}: [[The Horus Heresy Book Nine- Crusade]] **{{Endn|1a}}: pg.21**{{Endn|1a1b}}: pg.35**{{Endn|1b1c}}: pg.76 [[Category:Adeptus Mechanicus]]