Tactical Combat Casualty Care (TCCC) is broken up into 4 roles of care. As a combat medic/corpsman, the first medical provider to care for the casualty and initiate more advanced treatments in the continuum of prehospital care, it is important that you understand the roles and responsibilities of the nonmedical personnel (All Service Members (ASM) and Combat Lifesaver (CLS)) who may be assessing and providing care/assisting in the treatment of casualties with suspected head injuries in the prehospital environment.