Commons R-01, also known as Commons Red, is a generic United Nations Space Command term for one of the commons modules on the port side of an Orbital Defense Platform. It consists of a standard-sized rectangular room, with "islands" regularly spaced to the edges of the room. Security R-01 overlooks Commons R-01. John-117 rode on one of the trams right before the Battle of Earth begun in October, 2552.

Cairo Station Commons RedEdit

Cairo Station Commons Red was the United Nations Space Command portside commons of Cairo Station further from the bridge. During the Battle of Earth, Covenant boarders invaded Commons Red, hampering SPARTAN-117's efforts at getting to the Covenant bomb.