Steel Brigade troopers are the backbone of the G.I. Joe fighting force. The "grunts" of the team, they are chosen from the Greenshirt forces for their exceptional dedication and skills. They work hard to hone their skills so that they can move up the ranks into specialized positions. They meet every challenge with determination and enthusiasm, and eagerly go on missions where they can watch and learn from their superiors. The Steel Brigade Delta team members are mobile battle experts specializing in vehicular combat.