20 July Plot on Hitler's life in 1944, the Gestapo seized the diaries of Admiral Wilhelm Canaris, in which Oster's long term anti-Nazi activities were revealed. Oster was executed in April 1945, as Germany was on the verge of defeat - the Nazis being determined that he would not survive their fall. See also Assassination attempts on Adolf Hitler Pius XII and the German Resistance References Bibliography Conflicts in 1938 1938 in Germany German resistance to Nazism Conspiracies