[1] After the war, in 1920 he served in the Civil Service as the private secretary to the Foreign minister and was briefly a director for a German company in industry from 1924 to 1925.

He joined the Nazi Party in April 1932 and he worked at the propaganda ministry after Adolf Hitler came to power and became a member of the Allgemeine SS in 1934.

[2] With the outbreak of World War II Krukenberg re-joined the army as a major and served on the General Staff in Paris.

[4] The group made a long detour to avoid advance columns of the Red Army and entered Berlin at 22:00 hrs on 24 April 1945.

[6] The arrival of the French SS men bolstered the Nordland Division whose "Norge" and "Danmark" regiments had been decimated in the fighting against the Soviet Red Army.

[7] By 26 April, with Neukölln heavily penetrated by Soviet combat groups, Krukenberg prepared fallback positions for Sector C defenders around Hermannplatz.

[8] After an appeal by Krukenberg, General Weidling agreed to allow the re-deployment of the Nordland Division as one unit and not scattered in its employment.

[9] Forced to fall back on 27 April, Krukenberg's Nordland headquarters was a carriage in the Stadtmitte U-Bahn station in Defence sector Z (Central District).

But according to author A. Stephan Hamilton, it is far more probable that the massive bombardment of the city by hundreds of tons of shells and rockets by the Soviets caused the damage and flooding of the tunnels.