Reference.com explains that the Pullman Strike ended as a direct result of the violent intervention of federal troops deployed by President Grover Cleveland. Over 12,000 soldiers were sent into action in Chicago alone and by the strike's end, Libcom.org reports that at least 34 people were killed and the strike's main organizer, Eugene V. Debs, had been arrested for conspiracy and violating a court order.
According to Libcom.org, although the strike originated and was primarily centered on the South Side of Chicago (where the majority of Federal troops were ultimately sent) the strike was nationwide, as was its response. Government troops on a state and federal level were also deployed in Colorado, Oklahoma, Nevada, Iowa and California. The Pullman Strike was the first time in U.S. history that a strike was put down by government intervention, which marked a turning point in the U.S. Labor movement.
Debs, who had risen to prominence as a result of his role in the Pullman Strike, became radicalized while in prison. He would later become the first and most successful Socialist Party candidate for President of the United States, according to Wikipedia. He earned 6 percent of the popular vote in the general election of 1912.