|Successor Chapters||Marines Errant|
|Chapter Master||Gaius Aegius|
|Colours||Blue and white|
- Baran War - 914.M40-224.M41
- "Balur Secundus Strike Force" - 7th Co. only smash-party.
- The Defence of Hyth (994.M41) - Stopped a Hive Fleet. Alone.
- Fall of Medusa V (999.M41) - 4th Co. got honors and fought eight other races in the conflict.
- Zeist Campaign - Tau Vs. Space Marines. Matt Ward wrote it so you can guess how it went.
- The Indomitus Crusade - Can't have the Ultramarine Crusade without its successors right?