Wilhelm Canaris
Shortly before the outbreak of World War II, Hans Oster called Dohnányi into the Abwehr of the Oberkommando der Wehrmacht. Led by Wilhelm Canaris, it quite quickly became a hub of resistance activity against Hitler. Dohnányi protected Dietrich Bonhoeffer from conscription by bringing him into the Abwehr with the claim Bonhoeffer's numerous ecumenical contacts could be useful for Germany.