1-11. Successful leaders recognize that they must continually develop their subordinates by maximizing opportunities in the institutional, operational, and self-development domains. It is critical to the long-term sustainment of the Army. Leaders are responsible for ensuring their organizations develop subordinates, perform missions, apply doctrinally sound principles in training, and exercise stewardship of resources. Along with responsibility comes accountability. Accountability speaks to two levels: leaders held accountable for how well they have developed their subordinates and individuals held accountable for their own professional development.