Outpost C9 is a UNSC base on the coast, near Mombasa, Kenya on Earth.
The base was created long ago, but was re-purposed during the Battle of Earth, right after the New Mombasa Slipspace Event.
Numerous units or small elements of units were stationed at Outpost C9.
- ↑ Halo 3 - Map: High Ground
- ↑ Halo 3 - Description: High Ground