To save themselves the trouble of applying military science to Civil War history, many authors resort to a substitute, what they think is "common sense." But it's not. It's "literary sense."
Literary sense has its own structure and logic. When applied to history, it clears the path for a literary climax by setting fire to the undergrowth of common sense, military science, military theory, and especially historical truth.
When you see an historical writer blurbed as a "master storyteller," it means this is one who applies literary sense relentlessly, to everything.