I've been enjoying reading a biography of Napoleon and I am extremely interested in his Army structure and Marshalls. I love the Epic History TV series covering the topic and I was wondering if there is a book that covers this in greater detail?
/u/donaldfdraper and /u/waldo672 and /u/dandan_noodles may have more recommendations but I would start with the relevant entries of the subreddit booklist (you will need to scroll down a bit).