Fleet-based armies are those that operate across the Milky Way Galaxy without a fixed base or homeworld, and which normally operate on a highly-mobile basis from a fleet of starships. Such armies include almost the entire surviving, uncorrupted Eldar race who now operate from their great Craftworlds and many of the Chapters of the Space Marines. Many Fleet-based Chapters of Space Marines not only maintain large Chapter Fleets but also massive flagships that serve as a mobile fortress-monastery and are known as Chapter Barques.
Sources
- Warhammer 40,000 Rulebook (5th Edition)
- Codex: Space Marines (5th Edition)
- Deathwatch Core Rulebook (RPG)