The Lattimer massacre was the killing of at least 19 unarmed striking immigrant anthracite miners by a Luzerne County sheriff's posse at the Lattimer mine near Hazleton, Pennsylvania, United States, on September 10, 1897. The miners were mostly of Polish, Slovak, Lithuanian and German ethnicities. Scores more miners were wounded in the attack by the posse. The massacre was a turning point in the history of the United Mine Workers (UMW).
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