[1] Eberhard was born Helmut (or Hellmut) von Rauschenplat, a noble family in Dresden that dated back to the Middle Ages.

[2] In 1914, he began studying political science and economics, attending universities in Frankfurt am Main, Heidelberg und Tübingen.

[4] He began heading up the banned ISK in Germany in 1934 and worked on building an independent socialist trade union, the Unabhängigen Sozialistischen Gewerkschaft.

[4] He also worked closely with Hans Jahn and the railroad Resistance group organized by the International Transport Workers' Federation and he maintained contact with the Willi Eichler and the exiled ISK leadership in London.

Following his split, he worked closely with Waldemar von Knoeringen and Richard Löwenthal and with the Sender der europäischen Revolution.

Eberhard played a leading role in ensuring the right to conscientious objector status be included in the new laws of the Federal Republic of Germany.