References and Quotes
Reference
Intellectual Espionage
Though the military would decrease minimum requirements at various points in each of the three wars mentioned, they maintained a consistent scale that means clear information was preserved about the abilities of people they tested. I've included some of the primary documents from the secondary source Gatto cites, for any curious. Marginal Man and Military Service, The Ineffective Soldier, Army Training of Illiterates in World War II, Fitness of American Youth for Military Service, The Uneducated.