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
- Cerberus Heavy Tank Destroyer
- Deimos Pattern Predator
- Deimos Pattern Rhino
- Deimos Pattern Vindicator
- Deimos Pattern Vindicator Laser Destroyer
- Deimos Pattern Whirlwind Scorpius
- Dreadnought – Contemptor Pattern
- Dreadnought – Deredeo Pattern
- Dreadnought Drop Pod
- Falchion Super-Heavy Tank Destroyer
- Fellblade
- Glaive
- Javelin Attack Speeder
- Kratos Heavy Assault Tank
- Land Raider Achilles-Alpha pattern
- Land Raider Proteus
- Land Raider Spartan Assault Tank
- Legion Basilisk
- Leviathan Siege Dreadnought
- Mastodon Super Heavy Assault Transport
- Medusa
- Sabre Strike Tank
- Scimitar Jetbikes
- Sicaran Arcus Strike Tank
- Sicaran Battle Tank
- Sicaran Omega Tank Destroyer
- Sicaran Punisher Assault Tank
- Sicaran Venator
- Typhon Heavy Siege Tank
