Wayland Trench Raiders

And it's on past the skies and it's on past the stars, Come, brave men of Weyland and join the Imperial Guard, From the worlds of Saint Sabbath, the Throne it calls to thee, Enlist, ye men of Weyland, and come follow me! 

The Weyland Trench Fighters are the Imperial Guard regiments hailing from the planet Weyland, located in Segmentum Obscurus in the galactic north of the Imperium. Weyland is a harsh world, tidally locked to the red sun it orbits. The day side is blisteringly hot and subject to terrible radiation bursts from the red sun it orbits. The night is frozen over and completely covered in thick layers of ice. Such a harsh world may have been overlooked completely by the utilitarian adepts of the Imperium if it weren't for the rich silicon and metal deposits the planet harbours, which consequently meant that much of the planet is devoted to heavy industry and production of the war machines that sustain the Imperial Guard.Despite only a small strip of the planet being habitable, many of the hives that house the population are overcrowded, and those on the surface are vulnerable to the harsh aurora storms that ravage the planet. As a result, there is little regard for human life, and millions of guardsmen are subsequently conscripted into the Imperial Guard. These guardsmen are harsh and unyielding, masters of close combat and warfare in close quarters. Enduring years on end in the trenches, their grit and unyielding determination have been key to many victories in Imperial campaigns.