The Steel Strike of 1919 was an attempt by the American Federation of Labor to organize the leading company, United States Steel, in the American steel industry . The AFL formed a coalition of 24 unions, all of which had grown rapidly during World War I. In the lead role would be the Amalgamated Association of Iron, Steel and Tin Workers (AA) with a five-member steering committee. The strike began on September 22, 1919, and finally collapsed on January 8, 1920. The opposition led by Elbert H. Gary, president of U.S. Steel had triumphed.