Combat medics are trained military personnel who are responsible for providing first aid

First aid

First aid is the provision of initial care for an illness or injury. It is usually performed by non-expert, but trained personnel to a sick or injured person until definitive medical treatment can be accessed. Certain self-limiting illnesses or minor injuries may not require further medical care...

 and frontline trauma care

Medicine

Medicine is the science and art of healing. It encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness....

 on the battlefield. They are also responsible for providing continuing medical care in the absence of a readily available physician, including care for disease and battle injury. Combat medics are normally co-located with the combat troops they serve in order to easily move with the troops and monitor ongoing health.