U.S. labour strike at Andrew Carnegie 's steelworks in Homestead, Pa.
, in July 1892. When the Amalgamated Association of Iron and Steel Workers went on strike following a wage cut, the company's manager, Henry Clay Frick , hired strikebreakers, with Pinkerton Agency detectives to protect them. A gun battle resulted in which several people were killed and many injured; the governor sent state militiamen to support the company. The broken strike represented a major setback to the union movement that was felt for decades.