Hans Ulrich von Oertzen (6 March 1915 – 21 July 1944) was a German officer who served in Army Group Centre of the Wehrmacht during the Second World War.
He took part in the military-based 20 July Plot conspiracy against Adolf Hitler and many letters to his wife have been published that provide an insight into his thoughts during that period.
During the Second World War he was promoted to major and by 1943 was serving in Army Group Centre under Generalmajor Henning von Tresckow, who was one of the leading members of the resistance.
On 26 March 1944, he married Ingrid von Oertzen Langenn, and a selection of 240 letters he wrote to her from 1942 to 1944 were recently published in book form in Germany.
[1] On 20 July 1944 Oertzen was the liaison officer to the commander of the defense group III (Berlin) and passed on the first Valkyrie orders.