Here's a taste:
Inevitably in the times surrounding a fierce, heated battle a soldier must think occasionally "What on earth am I doing out here in the middle of nowhere, fighting for this silly little piece of land that my unit leader has told me to go out and take? It's not worth the bloodshed, I see no tactical or strategic merit to it, and besides, I could get killed for pretty much no reason other than taking that knoll, or traversing the river, or battling all day across this field. I have much better and even more useful things to do back in my tent."
I'll have more on this later.