"Every watch fortress is a light in the darkness, a blazing watchfire that drives back the shadows in which the xenos lurks. Without their illumination, the Emperor's worlds would be swallowed up one-by-one, bound into shrouds of endless night stitched close by alien claws." —Inquisitor Ishmael, excerpt from A Treatise on the Shield that Slays A watch fortress is a fortified Imperial installation that serves as a fortress, archive, garrison, command station and training facility to...