Evan Wright is the Perfect Audience Surrogate
So I thought I'd watch Das Boot again, since it had been many years - and what suprised me is the way it's told on the submarine using a Reporter/War Corrispondant - and everything is explained to him, the inner workings of the things all these men are expert in and would never explain otherwise.
And of course it made me compare that to Generation Kill - except Evan wasn't made up for the convenience of an audience surrogate... he's fortuitously just there, writing and framing the story as a newbie. It's so perfect a surrogate that Das Boot (and other stories) invent such a person just to try to bring the audience up to speed....