Title: Secret messages
Description: "In Secret Messages, David Alvarez provides the first comprehensive analysis of the impact of decoded radio messages (signals intelligence) upon American foreign policy and strategy from 1930 to 1945. He presents the most complete account to date of the U.S. Army's top-secret Signal Intelligence Service (SIS): its creation, struggles, and rapid wartime growth, and its contributions to the war effort."--Jacket.
Subjects: Diplomatic history, World War, 1939-1945, Cryptography, Foreign relations, History, World war, 1939-1945, cryptography, World war, 1939-1945, diplomatic history, United states, foreign relations, 1933-1945
Places: United States
Time periods: 20th century, 1933-1945