In 1936, with re-arrest possible, he was personally recruited into the German military intelligence service or
Abwehr by Admiral
Wilhelm Canaris as
Captain. He was stationed first to
Munich, then to
Vienna, then back to Germany to the army
headquarters at
Zossen, where he was promoted to
Oberstleutnant (
Lieutenant Colonel). While in Munich, he met fellow resister
Rudolf von Marogna-Redwitz; while in Vienna, he began to collect documentary evidence of Nazi crimes. After the invasion of
Poland in September 1939, Werner Schrader was transferred to German Army High Command Headquarters where he put together a secret archive - complete with reports and photographs - of SS atrocities in Poland. Wilhelm Canaris had successfully lobbied for an Abwehr presence at Army High Command Headquarters at Zossen. The small four-man sub-unit called the Special Duties Section was completely staffed by anti-Nazis - including Werner Schrader. He left the small section in September 1940 for a posting in Vienna but returned to Zossen and the Special Duties Section in 1941 where he would remain for the rest of his life. During the 1939 to 1944 period, Schrader had acted as the main custodian of various resistance-related files and documents, becoming one of the archivists to the
German resistance. In 1944, he also took on the responsibility of the detailed documents put together by
Hans von Dohnanyi and
Hans Oster. He particularly took care of the personal diary of his boss Admiral
Canaris, chief of
Abwehr and head of the German resistance movement against Hitler. ==20 July Bomb Plot==