The Solar Revenants
They are a fleet-based chapter specializing in void combat.
They almost never land troops on the ground; they defeat the enemy fleet. Then they bombard the supply depot with precision bombers to make it as difficult as possible for the enemy to operate. After that, they leave the rest to the PDF and other troops to secure the planet.
They are boarding and void combat specialists.
Some Space Marines and Serfs have never been to a planet.
They are 8/9 Founding and likely an Imperial Successor, but that information was lost during the destruction of their home world.
u/Sensitive_Equal_8812 — 9 hours ago