The twenty Space Marine Legions, also known as the Legiones Astartes, were created by the Emperor to take part in the Great Crusade in what was later known as the First Founding.
Many of the legions would use weapons and vehicles that by the 41st millennium would be the sole reserve of the Astra Militarum.
- Arquitor Bombard with Morbus Heavy Bombard
- Deimos Pattern Predator
- Deimos Pattern Rhino
- Deimos Pattern Vindicator
- Deimos Pattern Vindicator Laser Destroyer
- Deimos Pattern Whirlwind Scorpius
- Dreadnought Drop Pod
- Fellblade
- Glaive
- Javelin Attack Speeder with Missile Launchers
- Kratos Heavy Assault Tank
- Land Raider Achilles-Alpha pattern
- Land Raider Spartan Assault Tank
- Legion Basilisk
- Mastodon Heavy Assault Transport
- Medusa
- Sicaran Arcus Strike Tank
- Sicaran Battle Tank
- Sicaran Venator