The Draetheus system was a human-controlled star system. In the post-war years the UNSC established research facilities on the fifth planet. At some point after 2553, the system was attacked by a Covenant splinter-cell.
- Draetheus I
- Draetheus II
- Draetheus III
- Draetheus IV
- Draetheus V - A rocky planet home to a UNSC research colony.