Maybach I and II were a series of above and underground bunkers built 20 kilometres south of Berlin in Wünsdorf near Zossen, Brandenburg to house the High Command of the Army (in Maybach I) and the Supreme Command of the Armed Forces (in Maybach II) during the Second World War. Along with the military fortress complex Zossen, Maybach I and II were instrumental locations from which central planning for field operations of the Wehrmacht took place, and they provided a key connection between Berlin’s military and civilian leadership to the front lines of battle. The complex was named after the Maybach automobile engine.
Maybach I was built between 1937 and 1939 as the threat of war loomed. In December 1939, Maybach I was fully complete and operational. The complex consisted of twelve three-storey buildings above ground designed to look from the air like local housing, and two floors of interlinked bunkers with two-foot thick walls below. Deeper in the subterranean levels of Maybach I, there were wells for drinking water and plumbing, air-filter systems for protection against gas attacks, and diesel engines to keep the system operational. Later in the Second World War, the site was further camouflaged by the use of netting.
Maybach II, completed in 1940, was of the same design with eleven surface buildings. Incriminating evidence left by the conspirators of the 20 July Plot against Hitler was discovered at Maybach II in a safe at Zossen. Among the documents reportedly uncovered were excerpts from the diary of Wilhelm Canaris, conspiratorial correspondence between Abwehr agents, information on the secret negotiations between the Vatican and members of the originally planned (1938) coup d’état, data on the resistance activities of Lutheran minister Dietrich Bonhoeffer, and other incriminatory files concerning the military conspirators.
Between 15 and 17 January 1945, Oberkommando des Heeres (Supreme High Command of the German Army - OKH) moved into Maybach I. The army general staff moved their quarters into Maybach II. During 1945 the site was heavily bombed by both the British and Americans, including a raid on 15 March that injured Chief of the Army General Staff Hans Krebs.