With the immense number of troops available to the Guard, their fighting power tends to add up and may crush the strongest of foes. The Guardsmen can simply overwhelm the enemy – if it fails, they can get more men and attack again. It is said that if the Space Marines, who, in contrast, are fewer than Imperial planets, are the Imperium's scalpel, then the Imperial Guard is the hammer.
Imperial ArmyGreat Crusade, the 200-year expansion war in the 30th millennium when the Emperor of Man was reuniting mankind. Although the Emperor had his early Space Marine Legions to spearhead his invasion, the Astartes had not the numbers to claim and hold it all. Thus a larger force was needed to garrison conquered worlds, build massive sieges, and the like. This force was called the Imperial Army. Terra itself during the homeworld's Unification Wars by preserving some of the older military units (even though battlefields were dominated by early Space Marines). When new worlds were conquered, troops would be recruited from the population of each world; originally for defending against other invaders and to prevent rebellions. However, when the Imperium expanded, these armies were soon needed on the front as well. This was the founding of the Imperial Army, at that time placed under the command of the Space Marine Legions.
When the Horus Heresy struck and nine Space Marine Legions turned traitor, some of the Imperial Army units continued following orders from the Traitor Legions, turning on the loyalist army in civil war. Some ambitious commanders ignored the conflict altogether and set out to build their private empires.
Imperial GuardImperial Navy.
Excluding the lack of an integrated naval force, the Imperial Guard works much the same way as the old Imperial Army. Troops are still recruited from Imperial worlds and either assigned in the Planetary Defence Force or sent wherever needed.
There is no standard template for an Imperial Guard Regiment. As the population level, industrial capacity, military tradition and other factors make each world unique, so are their Regiments. There is variance in the size, equipment, training and command structure. A densely populated jungle world will naturally produce a different kind of army than a sparsely populated ice world.
Command hierarchyDepartmento Munitorum, which is led by three of the High Lords of Terra – the Chancellor of the Estate Imperium, the Master of the Administratum and the Lord Commander Militant of the Imperial Guard.
- Cadian 412th (Dawn of War: Winter Assault)
- 1st Kronus (Dawn of War: Dark Crusade)
- 252nd Kauravan Conservator (Dawn of War: Soulstorm)
- 85th Vendoland (Dawn of War II, Dawn of War II: Chaos Rising)
- House Vandis (Dawn of War II: Chaos Rising)
- Dawn of War/Imperial Guard -- the Imperial Guard faction in Dawn of War
- Winter Assault/Imperial Guard -- the Imperial Guard faction in Dawn of War: Winter Assault
- Dark Crusade/Imperial Guard -- the Imperial Guard faction in Dawn of War: Dark Crusade
- Soulstorm/Imperial Guard -- the Imperial Guard faction in Dawn of War: Soulstorm
- Dawn of War II/Imperial Guard -- the Imperial Guard faction in Dawn of War II and Dawn of War II: Chaos Rising
- Retribution/Imperial Guard -- the Imperial Guard faction in Dawn of War II: Retribution
- Cruddace, Robin. Warhammer 40,000. Codex: Imperial Guard. Nottingham: Games Workshop, 2008. Print.