Oban is a human planet that was originally used as a secret military training area prior to its colonization as an agrarian world.
At some point after the Human-Covenant war, the Office of Naval Intelligence found and secured Oban as a top secret military facility. Outposts and bases were established in the planet's mountains and the highlands of Saviron as a part of Operation: DAYBREAK.
- Oban is named after a town on the coast of Scotland. It has been noted by members of 343i and Certain Affinity that the planet resembles the Scottish Highlands.
- It is possible that Oban was not terraformed.
- This colony is the location of the map Daybreak from the Castle map pack for Halo 4.