Margarethe von Oven

Margarethe von Oven (1904, Berlin – 5 February 1991, Göttingen) was a secretary in the Bendlerblock and an accomplice in the 20 July plot to assassinate Adolf Hitler.

Margarethe's parents were Prussian nobility. Her father was Lieutenant Colonel Ludolf von Oven of the 115th Guards Infantry Regiment (1st Grand Duchy of Hesse) and Margarethe von Oven. Her father was killed on 22 August 1914 in the opening weeks of the First World War. Margarethe was raised with three siblings by her mother.

In 1920, Margarethe began work as a secretary in order to support her family financially. In 1925, she took a position as a secretary in the Defense Ministry and in 1928 she was sent to the military attache's office in Moscow for six months under an assumed name. She was on a secret mission at the time when Nazi Germany Reichswehr and communist Russia Red Army were still collaborating. From 1930 to 1935 she worked in Berlin at the Reichswehr Ministry. In 1938 she moved to Budapest and later, in 1940, to Lisbon as a secretary in the German military attaché office.

In her prewar Berlin days, she had worked as a secretary for Colonel General Kurt von Hammerstein-Equord and Colonel-General Werner von Fritsch in the Bendlerblock headquarters of the Defense Ministry. In the summer of 1943, Major General Henning von Tresckow requested that she be transferred to his office, placing complete trust in her because she was his wife's best friend since childhood. Through her relationship with von Tresckow, Margarethe was drawn into the preparations for the 20 July 1944 coup attempt against Hitler known as the 20 July Plot or the Valkyrie Conspiracy. Because von Tresckow was assigned to the Eastern Front, Margarethe was reassigned as a secretary in the headquarters of Army Group Centre, serving as a news headline monitor for the Berlin coup plotters. She also typed the orders and decrees in preparation for the coup. She frequently met with Tresckow and Claus von Stauffenberg during the summer and fall of 1943 outside the Bendlerblock in order to discuss and modify orders and was fully aware of the plot.

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