Missing in action is a casualty classification assigned to combatants, military chaplains, combat medics, and prisoners of war who are reported missing during wartime or ceasefire.
Combat medics or Field medics are military personnel who have been trained to at least an EMT level, and are responsible for providing first aid and frontline trauma care on the battlefield.
A prisoner of war is a person, whether combatant or non-combatant, who is held in custody by a belligerent power during or immediately after an armed conflict.
A ceasefire, also called cease fire, is a temporary stoppage of a war in which each side agrees with the other to suspend aggressive actions.
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They may have been killed, wounded, captured, or deserted.
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If deceased, neither their remains nor grave has been positively identified.
Becoming MIA has been an occupational risk for as long as there has been warfare or ceasefire.