1976: Joseph Rochefort, who led Station HYPO in WWII, died.
Station HYPO was the U.S. Navy’s signals monitoring and cryptographic intelligence unit at Pearl Harbor, and was responsible for breaking the Japanese navy’s code before the Battle of Midway.
Joseph Rochefort was inducted into the Cryptologic Hall of Honor in 2000. Visit the link below to learn more.
If you'd like to learn more about Joseph Rochefort, don't miss Elliot Carlson's book, "Joe Rochefort's War," which covers not only the military strategy and intelligence background, but also the personality and politics surrounding Rochefort and significant events he participated in. Learn more about the book via the link below.