By request, here are some of the books I used to help me understand and improve in the craft of non-fiction story-telling. My own observation is that the Civil War field, and history in general, while having an inexhaustible supply of quality thinkers, great research and painstaking detail, suffers from an under supply of talented writers. Here are my personal favorites on the craft of writing and I am sure there are many others:
Story Craft: The Complete Guide to Writing Narrative Nonfiction by Jack Hart (University of Chicago Press, 2011)
Voice and Vision: A Guide to Writing History and Other Serious Nonfiction by Stephen J. Pyne (Harvard U Press, 2009)
Clear and Simple as the Truth: Writing Classic Prose by Francis-Noel Thomas and Mark Turner (Princeton U Press, 2011)
You Can't Make This Stuff Up: The Complete Guide to Writing Creative Nonfiction from Memoir to Literary Journalism and Everything in Between by Lee Gutkind (De Capo Press, 2011).
Gutkind may set the record for the longest subtitle of the 21st century. Hope this is helpful. I think you need to find out if you have a talent for writing. If you do, these books can improve the skills portion of the equation.