I like it when war non-fiction includes the parts in which exciting stuff isn't happening, letting you see what it was like between action or out of the way of the action
This is really good about portraying the daily life, mentality, etc of the subjects and touched on that sort of thing most rather than focus mainly on combat. The books I've read about the Rhodesian Bush War are really good about it, too, with most of it being about EVERYTHING the person had to do and what they did in their downtime