|The following is based on Fallout: Brotherhood of Steel and has not been confirmed by canon sources.|
This is no longer my fight, soldier. Here, take my Brotherhood insignia. A sign of my trust... that you will do what must be done...”— Rhombus
After having proved themselves and having gained the trust of the Brotherhood of Steel, the insignia is given to new members. It is considered an honorary item to wear.
An insignia in the form of the Brotherhood logo, red in appearance.