The Navy women broke enemy naval codes used across the world’s major oceans. Women formed the cryptanalytic assembly line that exploited the Japanese fleet code known as JN-25. They helped in the effort to shoot down the plane of Admiral Isoroku Yamamoto, architect of the attack at Pearl Harbor. “We really felt we had done something really fantastic,” said one, Myrtle Otto. “That was an exciting day.” Courtesy of National Archives and Records Administration
