Rote Kapelle (Red Orchestra) was the name the Gestapo gave to several Resistance organizations in different countries. The Red Orchestra in Berlin was composed of a small group of people with Nazi affiliations who worked to overthrow the Nazi government from the inside by passing top-secret and high-level information to the Soviets. They also recruited Resistance members and helped hide Jews.
One of the women involved in the Berlin-based Red Orchestra was an American named Mildred Fish Harnack, a scholar, translator, and professor of the German language. After she was caught and tried, she received a prison sentence. But Hitler specifically ordered a new trial for her, which resulted in the death sentence. Just before she was beheaded, she was reported to have said, "And I have loved Germany so much."
Excerpt from the German introduction of Women Heroes of World War II: 26 Stories of Espionage, Sabotage, Resistance, and Rescue.