The document discusses the history of labor unions in the Gilded Age. It details some of the earliest attempts at unions including the National Labor Union formed in 1866 and the Knights of Labor in the 1870s. Both of these organizations struggled and eventually collapsed. In the 1890s, the most prominent unions were the American Federation of Labor, Industrial Workers of the World, and American Railway Union. The American Railway Union led a major strike in 1894 that resulted in the creation of Labor Day.