Most soldiers who died during the war succumbed to disease. The service file for James H. Kilpatrick, Co. "F", 2nd Battalion, Hilliard's Alabama Legion, includes a claim for pay due the deceased soldier. Filed in Coosa County AL by his father, John Kilpatrick, it clearly states the cause of death as "sickness." It also includes a descriptive record for JHK which may be useful to you.
Can I assume that you have not seen JHK's service file?