- Main article: Battle of XI Boötis A
- Similar to the Epsilon Indi system, the real XI Boötis A is much closer to Earth, being only 21.8 lightyears from Sol.
- Halo Wars: Genesis (First appearance)
- Halo: Evolutions - Essential Tales of the Halo Universe
- ↑ While never directly stated as an outer colony, the fact that it was attacked in 2528 (very close to the loss of Harvest and way before the 2536 date for the breach of the inner colonies), it can be assumed that it is an Outer colony.