Kurt von Schleicher
He followed his father into the Prussian Army and joined the 3rd Foot Guards regiment in 1903, where he befriended Kurt von Schleicher. Initially, his career did not prosper, as Hindenburg's superiors considered him to be of low intelligence. Nevertheless, after his father became a German World War I hero upon the Battle of Tannenberg, Oskar von Hindenburg's career started to advance thanks to his surname. A General Staff officer at the "Armeeoberkommando" during the war, he achieved the rank of "Hauptmann" (Captain) in the 20th Division.