Capt. James Stockdale was the senior ranking officer at the infamous Hoa Lo prison, the Hanoi Hilton. After three months of being a POW, he was able to write a letter to his wife, Sybil, and then a second one a couple months later. Sybil noticed there was something off about his letters, leading to the CIA and Office of Naval Intelligence discovering that he was speaking in code. Stockdale was able to communicate in Washington through these letters and teach other prisoners how to communicate in the secret code, leading them to creating short wave radios. 591 POWs were repatriated back to the United States in January 1973, and Stockdale was awarded the Medal of Honor from President Gerald Ford for his leadership and resistance efforts.
The Crossroads of Special Operations