Past Brigades in Halo 3

This is from what I know.

RoG Massacre - Merged with RoG Phoenix to form RoG Impulse

RoG Phoenix - Merged with RoG Massacre to form RoG Impulse

RoG Velocity - Merged with Crisis due to lack of leadership and Commander

RoG Phenom - Changed named to RoG Crisis

RoG Hardcore - Merged with RoG Deception do to lack of leadership

RoG Vengeance - A Halo 3 brigade.

RoG LEGENDZ - Very first Halo 3 brigade.