http://www.history.army.mil/html/bookshelves/collect/usaww2.html

In pdf format and downloadable free.

The pictorial record books are of particular interest, as they contain a huge number of captioned photos, most of which I have not seen before:

U.S. Army in World War II: Pictorial Record:

> The War Against Japan:
http://www.history.army.mil/html/books/012/12-1/index.html

> The War Against Germany and Italy:
http://www.history.army.mil/html/books/012/12-2/index.html

> The War Against Germany:
http://www.history.army.mil/html/books/012/12-3/index.html