In 2010, Mandalorian Mercs instituted a program that allows Official Members to strive beyond just having an approved costume by joining one of several profession-based groups called “Brigades”. Each Brigade consists of a set of professions that require certain costume customizations to be recognized as a member of the profession and Brigade. Brigade Requirement Lists (BRL’s) are listed for each profession within the Brigade, and official members striving for Brigade membership must apply under these requirements.
Once you are accepted as a Brigade member, you will be issues a special Brigade Armor Sigil that can be applied to your armor, which will let everyone in Mercs know you have committed yourself to a Brigade.
Brigade membership is voluntary for Official Members, and you do not have to be part of a Brigade to be an Official Member. However, Brigade membership is ONLY open to Official Members.
Read more about the brigades here.