Rear Admiral

Rear Admiral refers to two separate senior commissioned officer ranks of the UNSC Navy:
 * Rear Admiral (Upper Half), equal in rank to Major General in the UNSC Army and UNSC Marine Corps.
 * Rear Admiral (Lower Half), equal in rank to Brigadier General in the UNSC Army and UNSC Marine Corps.

Rear Admiral may also refer to a multiplayer commendation in Halo: Reach:
 * Rear Admiral (commendation)