Erich Hoepner (14 September 1886 – 8 August 1944) was a German general during World War II. An early proponent of mechanisation and armoured warfare, he was a Wehrmacht army corps commander at the beginning of the war, leading his troops during the invasion of Poland and the Battle of France.
Dismissed from the Wehrmacht after the failure of the 1941 campaign, Hoepner restored his pension rights through a lawsuit. He was implicated in the failed 20 July plot against Adolf Hitler and executed in 1944.
Hoepner was born in Frankfurt (Oder), the son of General Kurt Hoepner. He was commissioned into the Imperial German Army as a cavalry lieutenant in 1906, joining the 13th Schleswig-Holstein Dragoons Regiment (de). In 1911 he attended the Prussian Staff College and was assigned to the General Staff of the XVI Corps. When the First World War began he was assigned to the Western Front, serving as a company commander and staff officer for several corps and armies. He fought as part of the 105th Division in the German Spring Offensive of 1918, ending the war in the cavalry.