Over 30,000 Union and nearly 26,000 Confederate prisoners died in captivity. Just over 12% of the captives in Northern prisons died, compared to 15.5% for Southern prisons. (reports from "Harper's Weekly "1863-64; illustrated)
Note that the South was subjected to a blockade by the north which resulted in a scarcity of all resources for everyone in the south, military and civilian. (Much like Germany in WW1.)
iakov the fool
Like they say "war is hell for both sides" , but now back to topic.