1 Codex: Astra Militarum
The Astra Militarum is the implacable military arm of the Imperium, and one of the biggest forces in the galaxy. On thousands of battlefields scattered all through the galaxy, the troopers of the Astra Militarum march to war. They are the Hammer of the Emperor, who with faith, fury and sheer weight of numbers crush heretics and xenos alike under their boots. Massed ranks of Guardsmen unleash focused salvoes of las-blasts whilst officers bellow orders over the thunderous roar of tank and artillery fire.