On April 20, 1914, after a disagreement between Ludlow Colony miners and National Guardsmen, the two sides opened fire in a day-long battle. As the barrage of bullets overwhelmed the colony, the National Guard troops set the tents on fire, which completely destroyed the encampment. 

Remembering the Ludlow Massacre 100 years later

The massacre, which took place on April 20, 1914, was just one event in the Colorado Coal Field Wars which comprised a longer conflict over dangerous working conditions and unfair labor practices.

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(Photo: Courtesy of the Denver Public Library)

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