Answer:
Unsanitary conditions caused the emergence of killer diseases.
Explanation:
Many soldiers lived in unsanitary conditions during the civil war and often had no access to proper medical treatment. The development led to massive deaths caused by killer diseases emanating from unhealthy conditions.
In fact, thousands of soldiers died of many diseases (diarrhea, typhoid and dysentery) arising from eating contaminated food and drinking bad water during the civil war.
