Mildred Harnack: Together with her husband she formed a resistance group to oppose Hitler, which later was dubbed the "Red Orchestra" by the Nazis. The group passed on intelligence to the Americans (1938-41) and the Soviets (1935, 1940-42). On Hitler's orders, Mildred Harnack was executed at Plötzensee on February 16, 1943. She was the only American woman sentenced to death on direct orders of Adolph Hitler.