Women at that time could not join the U.S. Navy except as civilians, and certainly could not go to sea except as nurses; confined to a landlocked desk, Agnes Driscoll not only diagnosed the “super-enciphered” code that Japan’s naval commanders were using; she trained many of the male naval officers who would get the credit during the war, when code-breaking enabled the great American sea victory in the Battle of Midway and other Pacific victories.