Wehrmacht officer Karl Biedermann hanged by SS.On the board , it is written that : "I have made a pact with the Bolscheviks ".

 Wehrmacht officer Karl Biedermann hanged by SS.On the board , it  is written that : "I have made a pact with the Bolscheviks ".

The German officer is Karl Biedermann. He was part of German resistance group.

Biedermann joined the resistance group of Austrian Wehrmacht people led by Major Carl Szokoll within military districtII.

 In spring 1945, this group planned "Operation Radetzky", to support Red Army in the battle of Vienna and to prevent further destruction, to avoid the blowup of bridges.

However, "Operation Radetzky", planned for 6 April 1945, was discovered. Biedermann was arrested the night from 5 to 6 April 1945 and brought to a Drumhead court-martial and sentenced to death. 

On 8 April 1945 Biedermann was hanged together with two other resistance fighters, captain Alfred Huth and Rudolf Raschke in public at Floridsdorfer Spitz in Vienna. The chief of "Sicheitspolizei and SD", Rudolf Mildner personally took command at the hanging place.

Biedermann was buried 2 August 1945 in Vienna on Hietzingen cemetery in a honorable grave (group 66, row 19, number 5). In the same grave were buried also Alfred Huth and Rudolf Raschke.

In the year 1995, in Wien-Floridsdorf, the Karl-Biedermann-Gasse was named after him (Karl-Biedermann-Alley.