Final answer:
During the American Civil War, disease claimed twice as many lives as battlefield injuries due to unsanitary conditions in camps and poor medical care.
Step-by-step explanation:
In the context of the American Civil War, twice as many soldiers died from disease resulting from unsanitary conditions than from wounds inflicted directly on the battlefield. The lack of sanitary training camps, healthy food supplies, and adequate knowledge of how to prevent and treat tropical diseases contributed significantly to this high mortality rate due to illnesses. Camps like Andersonville and Elmira became notorious for their unsanitary conditions and resulting high death rates amongst prisoners, with diseases such as scurvy and infections from poorly attended wounds being common. The unsanitary conditions in these environments fostered the spread of disease, making disease a lethal threat to soldiers beyond the immediate perils of combat.