During WWII, 93% of the United States Army was Draftees.
It was a magnificent fighting force, both in Europe and the Pacific, and in all forms of operations, including amphibious, conducting the largest, and the most, amphibious landings, and Airborne operations in Europe and in the Pacific.
The Army continued using Indian Wind-talkers as radio operators, a practice they started in WWI, and in WWII continued in all theaters of the war, the Pacific, Europe, and North Africa.
38.8% (6,332,000) of U.S. servicemen and all servicewomen were volunteers
61.2% (11,535,000) were draftees