Stress is the response of the mind and body to danger. Elimination of stress is both impossible and undesirable. The aim of war is to impose as much stress as possible on the enemy so that they will lose the will to fight.
Armies accept severe stress in order to inflict greater stress on the enemy.
To win, armies must control combat stress. Controlled combat stress gives soldiers the necessary alertness, strength, and endurance to accomplish their mission. It elicits loyalty, selflessness, and heroism. Uncontrolled combat stress, on the other hand, can cause behavior that interferes with the unit mission. It can lead to disaster and defeat.