Spartacus League
Rosa Luxemburg published the "Junius Pamphlet" in Switzerland in April 1916, and it was secretly distributed in Germany. The text, also known as "The crisis in German Social Democracy", had been started in prison in February 1915. It was adopted as the founding policy statement of the International Group, better known as the Spartacus League, which became one element of the Communist Party of Germany in January 1919.