Orbital Defense Command

The Orbital Defense Command is a functional component of the UNSC Air Force, charged with orbital planetary defense for the colonies under the purview of the Unified Earth Government. The command operates and maintains the vast array of defense platforms in geosynchronous orbit around Earth and the Inner Colonies, such as Reach and New Carthage.

The Orbital Defense Command's network of defense platforms serve as the first line of defense for colonies and works closely with the UNSC Navy's Fleet Command.

Behind the scenes
While orbital defense platforms have been commonly known elements in the Halo universe since 2001's The Fall of Reach, it was only until Halo 4 that the unit commanding these stations was actually named.

List of appearances

 * Halo 4