Combat Stress is the mental, emotional or physical tension, strain, or distress resulting from exposure to combat and combat-related conditions. Controlling combat stress is a command responsibility. In terms of Service members lost from action and reduced performance, combat stress seriously affects mission accomplishment. It is a leader"s responsibility to take action to strengthen Service members" tolerance to combat stress and manage it in his or her unit. Marine Corps Reference Publication (MCRP) 6-11C, "Combat Stress," provides the tactics, techniques,and procedures required for small-unit leaders to effectively prevent, identify, and manage combat stress when it occurs in their units/commands.