Which source would a historian best understand the effect of the civil war on soldiers' families?

The correct answer to this open question is the following.

The source that would help a historian best understand the effect of the Civil War on soldiers' families is an oral history dictated by a soldier's adolescent son.

Primary sources are very important when doing research. A primary source is the source of information provided by a person that lived in the time when the event occurred or directly witnessed the event or the incident. That is why an oral history dictated by a soldier's adolescent son is a source that would help a historian best understand the effect of the Civil War on soldiers' families. He was the witness of what happened during the Civil War.

where is thing if you show me on the map or have a map i can answer your question

not all were fit for battle and were weak.