 Complete the following phrase:  In 1913, she became the president of the Union of Domestic Workers of Germany, requiring her to move back to her home city of Berlin. During World War I Kähler supported left wing SPD politicians, that included Clara Zetkin and Rosa Luxemburg in rejecting the partys policy of Burgfrieden a truce with the government, promising to refrain from any strikes during the war and attended an international socialist womens anti-war conference in Berlin organised by Zetkin in 1915. After the War Germany and Berlin witnessed a period of politically driven civil conflict known as the 