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A UNSC research facility on Oban, with several naval vessels hovering nearby.

Oban is a mountainous planet and a human colony of the Unified Earth Government.[1]


After the Human-Covenant War, the United Nations Space Command discovered the planet and used it as a home for millions of human refugees.[2] The UNSC Navy maintained a presence on the planet, using it as a staging ground for a number of highly classified military exercises, including Operation: DAYBREAK, located in the highlands of Saviron.[3]

On July 16, 2558, the planet was attacked by Jul 'Mdama's Covenant and his Promethean allies. The attack was advocated by Doctor Catherine Halsey, who believed that a bold move would attract UNSC Infinity. As Halsey predicted, Infinity was deployed to the planet and Commander Sarah Palmer led a joint Spartan-UNSC Marine operation in response to the attack. The UNSC eventually repelled the attack, and only minor damaged was inflicted upon a new power station halting the colonization of the planet. However, Jul's Covenant attacked Oban just to lead Infinity into a trap.[4]

In October 2558, a Forerunner Guardian on Oban was activated and sent to Genesis by the Created, inadvertently taking a UNSC Marine patrol along with it.[5] Oban, along with Conrad's Point and Ursa IV, was one of the first five colonies in which a Guardian was activated, with the Guardian's activation causing widespread destruction and numerous causalities on the planet.[6]


It is likely the planet is named after the Scottish town Oban.

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