Major

Major is a common rank both in the Covenant and the UNSC. "Major" may refer to any of the following:

Covenant

 * Major Grunts, red armored Gruntss.
 * Major Brutes, armored Brutes (Halo 2), Dark blue armor (Halo 3).
 * Major Jackals, orange armored/shielded Jackals.
 * Major Elites, red armored Elites.
 * Drone Majors, a Drone rank in Halo 3.

UNSC

 * Major, commissioned officer rank of the UNSC Marine Corps and UNSC Army.
 * Major General, 3rd highest rank in the UNSC Marine Corps and UNSC Army.
 * Major (Halo 3), a rank in Halo 3.

Forerunner

 * Sentinel Majors, the gold-plated Sentinel constructs with shields.