The first statewide federated labor body was the Mechanics' State Council that championed the eight-hour day against the employers' 1867 "Ten Hour League". The Council affiliated with the National Labor Union, America's first national union effort. By 1872 Chinese workers comprised half of all factory workers in San Francisco and were paid wages far below white workers. "The Chinese Must Go!" was the slogan of Denis Kearney, a prominent labor leader in San Francisco. He appeared on the scene in 1877 and led sandlot vigilantes that roamed the city beating Chinese and wrecking their businesses.