Wilhelm Groener
Treviranus has played a significant role in the development of Brüning's government in March 1930. In December 1929, he had participated in preliminary discussions with Brüning, Kurt von Schleicher, Defence Minister Wilhelm Groener and President Hindenburg's head of office Otto Meissner, at the home of his national conservative party friend Friedrich Wilhelm Freiherr von Willisen. Hindenburg gave Brüning the task of forming a cabinet that would govern without the Social Democrats (SPD).