I saw one that broke it down Army Marine Active Reserve Guard and I can't remember exactly where I saw it. That's about all I can remember about it other than the bulk of the causualties came from the Marines.
That would make sense if the Marines were engaged in most of the offensive operations. As it it we hear the media lump in deaths in the field with deaths everywhere else. For some reason the military does not highlight offensive operations in the way I would expect.