2-112. The Warrior Ethos is perishable, so commanders continually affirm, develop, and sustain it. Developing it demands inculcating self-discipline in the commander, subordinates, and the command. It requires tough, realistic training that develops the resiliency needed to endure extremes of weather, physical exertion, and lack of sleep and food. Commanders develop the will, determination, and the confidence that they, their subordinates, and their formations will accomplish all missions regardless of conditions.