Correspondence, reports, writings, and research notes, relating to United States Army internal security measures during World War II directed against American citizens of Japanese, Italian and German extraction. Used as research material for the book by E. N. Barnhart and Jacobus ten Broek, Prejudice, War and Constitution (Berkeley, 1955). Includes a photocopy of a typescript study, entitled Internal Security in World War II: Military Programs of Civilian Control. Barnhart was an American historian.