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A better method of federal intervention occurred during a 1902 strike of anthracite coal miners, under the banner of the United Mine Workers. More than 100,000 miners in northeastern Pennsylvania called a strike on May 12, and kept the mines closed all that summer. When the mine owners refused a UMW proposal for arbitration, President Theodore Roosevelt intervened on Oct. 3, and on Oct. 16 appointed a commission of mediation and arbitration. Five days later the miners returned to their jobs, and five months later the Presidential Commission awarded them a 10 percent wage increase and shorter work days-but not the formal union recognition they had sought.