Definitions:
Combat Operational Stress – the sum of the physical and emotional stressors experienced due to combat or extended operations
Combat/Operational Stress Reaction (COSR) - broad group of physical, mental and emotional signs that result from combat/operation stress
Combat/Operational Stress Reaction Casualty – soldier who is combat ineffective due to COSR
Battle Fatigue- Broad group of physical, mental and emotional signs that result from COS.





