Some remarkably brief paragraphs concerning the required military training of the average American Doughboy throughout the course of America's blessedly short participation in the Great War:
"The average American soldier who went to France received six months of training in this country before he sailed. After he landed overseas he had two months of training before entering the battle line. The part of the battle line that he entered was in a quiet sector and here he remained one month before going into an active sector and taking part in hard fighting."
It was later discovered that a full sixty percent of the invalided Doughboys were mentally deficient, and the Army was unable to screen them out - you can read about that here
Click here to read a 1918 magazine article about the Doughboy training camps.