After Latvian agrarian reforms in 1920 and subsequent nationalisation of manor lands he decided to leave Latvia in 1922 in order to enter the Army of Weimar Germany (Reichswehr).

After more negative experiences with war crimes during the German invasion of the Soviet Union (Operation Barbarossa), Loringhoven joined the resistance against Nazi Germany.

In 1943, with the help of Admiral Wilhelm Canaris, Loringhoven was relocated to the High Command of the German Armed Forces (Oberkommando der Wehrmacht, or OKW) as a colonel.

Nonetheless, Ernst Kaltenbrunner, Chief of the Reich Security Main Office (Reichssicherheitshauptamt; RSHA), discovered the actions of Loringhoven.

On 26 July 1944, immediately before he was to be arrested by the Gestapo and fully aware of the interrogation techniques utilized by them, Loringhoven committed suicide at Mauerwald in East Prussia.