Secret Messages: Codebreaking and American Diplomacy, 1930-1945

To defeat your enemies you must know them well. In wartime, however, enemy codemakers make that task much more difficult. If you cannot break their codes and read their messages, you may discover too late the enemy’s intentions. That’s why codebreakers were considered such a crucial weapon during World War II.

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 fr...