Grimm–Hoffmann affair
The Grimm–Hoffmann affair was a short-lived scandal that threatened Switzerland's neutrality during World War I. Robert Grimm, a socialist politician, travelled to the Russian Republic as an activist to negotiate a separate peace between Russia and the German Empire, in order to end the war on the Eastern Front in the interests of socialism. When the Allies discovered the proposed peace deal, he had to return home. Arthur Hoffmann, the Swiss Federal Councillor who had supported Grimm, had to resign.