uncharted territory

Working on the First Bull Run chapter this week. I have never written military history before, and it is frantic. As much of it as I have read, there is no substitute for writing it. Who were the commanders, what was their command structure? How do I get my reader to understand the relationship of General Heintzelman to Private Alcock? So many layers to explain, and not bore a reader to tears. Can I just concentrate on my lost lambs (the rest of Ellsworth's regiment) and ignore the rest of the battle? I wish someone would tell me--where is that advisor?? I need an advisor!!