Triplex Sector

The Triplex Sector is a grouping of forges in the Eastern Fringe of the Ultima Segmentum, comprising Triplex Phall, Galatia and Thule. Its forges once rivalled Mars in standing, despite their position at the edge of the mapped Imperium.

During the Thramas Crusade, the Night Lords attacked the forges because they were supplying arms to Dorn. Some of the Mechanicum priesthoods changed allegiance in the course of the fighting, and the Lion subsequently arrived in the sector. In the forty-first millennium, Triplex Phall remains in existence, defended by Legio Victorum. It does not share its Standard Template Construct (STC) designs with Mars.

The Triplex Sector retains significance as the last remaining shipyard of the Eastern Fringe. Unofficial maps place it within the Ultima Segmentum and record Triplex Phall as a direct subdivision of the sector.