Organized and staffed to plan, conduct and evaluate training exercises for the Army National Guard, Army Reserve Combat Support and Combat Service Support Units at the squad, platoon/section, and company/battery levels and above. Located onboard Fort Drum, New York.

Located in Fort Totten, NY, the mission of the unit is to administer the assigned and attached reinforcement training units and IMA detachments within its geographic area of responsibility, and supervise training, maintaining the professional expertise of the Individual Ready Reserve personnel attached to it