エアハルト海兵旅団
Liedig volunteered the German Imperial Navy in October 1916, was educated at the Naval Academy Mürwik and served as an Artillery Officer on a Torpedo boat. After a short time of internment at Scapa Flow in 1919, he started to study at the Technical University Munich. Liedig was a member of the Freikorps Marinebrigade Ehrhardt, deployed in Berlin and Upper Silesia in 1919/20, and a participant of the Kapp Putsch in March 1920. Liedig left the navy in September 1920 and was active in some rightwing organisations throughout the 1920s. Liedig studied law and worked as a lawyer.