Background
Lehndorff was born in Hanover, Germany and studied economics and business administration in Frankfurt am Main.
Lehndorff was born in Hanover, Germany and studied economics and business administration in Frankfurt am Main.
In 1936 he took over the management of the family estate Steinort in East Prussia. After the Second World War broke out, he was first deployed in Poland, and later, as a reserve lieutenant, posted to General Fedor von Bock"s staff, who later became supreme commander of Army Group Centre (Heeresgruppe Mitte). During Operation Barbarossa (the German attack on the Soviet Union), Lehndorff became an eyewitness to a massacre of the Jewish population near Barysaŭ in Belarus by Einsatzgruppen.
As a first lieutenant in the reserves, Lehndorff was deployed as liaison officer to Defence District I (East Prussia) in Königsberg (today Kaliningrad, Russia).
One day after the failed attempt on Hitler"s life at the Wolf"s Lair on 20 July 1944, Lehndorff was arrested. Along with Kurt Hahn, Gerhard Knaak, Hans Otto Erdmann and Max Ulrich von Drechsel he was sentenced to death by the Volksgerichtshof under Günther Nebelung on 4 September 1944.
He was hanged the same day at Plötzensee Prison in Berlin.