Pictures of the seven policemen killed during the 1866 Haymarket Square bombing, and of police charging the "murderous rioters."
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Two page spread showing police charging rioters on May 4th in Haymarket Square, Chicago, and bust portraits of seven policemen.

Credit: Library of Congress

The bomb that exploded in Chicago's Haymarket Square on May 14, 1886, killed seven policemen. It also ended the Knights of Labor's brief reign as the nation's most powerful labor union. In the aftermath, the American Federation of Labor, emphasizing union representation of skilled crafts, would emerge as the nation's most influential labor organization.

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