Brigade

A brigade is military unit employed in multiple military organisations.

Covenant
The Covenant use brigades or an equivalent thereof - with legions likely fulfilling this similar role. Most Covenant brigades or brigade-equivalents include a light company of roughly one-hundred Yanme'e to serve as scouts.

Mesra
The Militia of Mesra had multiple brigade-level units. Most were destroyed during the eight-day Battle of Mesra.

UNSC Armed Forces
Brigades are a common element in the United Nations Space Command armed forces, being employed in both the Army and Marine Corps. In the UNICOM rank structure, a brigade is commanded by an O-6 Colonel. However in the case of the 24th Marine Engineering Brigade, a Brigadier General; Artur Pahlavi served as the unit commander. Brigades typically employ around five thousand personnel.

Brigades have yet to see significant mention or development in official Halo media. In modern military forces, brigades are usually composed of three to six battalions, while three or more brigades are considered a division.

UNSC Army

 * 8th Armored Brigade - An armored brigade that participated in the Battle at Szurdok Ridge on Reach.
 * 34th Infantry Brigade - An infantry brigade that participated in the Battle at Szurdok Ridge.
 * 124th Infantry Brigade - A mechanized infantry formation of the UNSC Army during the Fall of Reach.

UNSC Marine Corps

 * 24th Marine Engineering Brigade - A Marine brigade that participated in the Battle of Mesra during the early years of the Human-Covenant War.

List of appearances

 * Halo: Reach
 * Halo: Oblivion