I bring today a truly fantastic freebie: the European Theater US Army Pictorial Book in eBook format published by The US Army Center for Military History, a well of information for any military history aficionado from the AWI to the modern conflicts of Afghanistan or Irak. Caught a glimpse of the book at the Arkie Gamer blog, incidentally another one to add to your favourites list.
The 450+ pages long work spans from the build-up period in England (1943) to the final months of the war in May 1945. If you plan to build a US force for Chain of Command, here you have tons of inspiration to personalise your army!
Really worth downloading, but it takes some time so don't be in a hurry or use a slow connection to attempt it.
These are a couple of sample pages