A tense miners’ strike escalated to violence on April 20, 1914 at a Rockefeller-owned Colorado Fuel & Iron Mine in Las Animas County, involving Colorado National Guard raiding a camp of striking coal miners.

Today, the Ludlow Massacre is widely recognized as a pivotal turning point in the struggle for workers’ rights in the United States.

Miners and their families had previously been evicted from their homes after CF&I rejected the miners’ requests for hourly pay, collective bargaining rights, and safer working conditions. CF&I’s rejection of the miners’ demands led to the strike, and workers and their families were forced to create a tent colony in Ludlow.

CF&I was one of the most powerful mining companies during the period, with 7,000 workers and control of nearly 70,000 acres of land. The company was also one of the worst violators of existing mine safety rules, according to the National Park Service (NPS).

The strike came to a breaking point when Colorado National Guardsmen were mobilized in an effort to break the strike and attacked the Ludlow Tent Colony. A gun battle between the miners and company guards and Colorado National Guardsmen broke out. When miners fled to the hills, the militia led a raid that ended in the burning of the camp. Tragically, this resulted in the deaths of 13 women and children who were trapped in a hiding place in a tent cellar.

In total, 21 people were killed in the massacre.

The Ludlow Massacre triggered 10 days of ongoing conflict in Colorado as miners attacked a series of mines on a 40-mile stretch between Trinidad and Walsenburg. According to a previous article from The Gazette, more than 70 people died in conflicts along the Front Range between 1913 and 1914 in what is now known as the Colorado Coalfield War.

The public outcry that followed the massacre spurred Congress into action, leading the House Committee to launch an investigation into the tragedy. Their 1915 report helped drive the adoption of child labor laws and the enforcement of the eight-hour workday.

According to NPS, the landscape where the tent colony was located is designated as a National Historic Landmark.

The Ludlow Massacre Memorial was vandalized in 2003 and later repaired in 2005. The United Mine Workers of America established the memorial, which invites visitors to walk down the stairs to where the women and children were found.

Today, the Ludlow Massacre represents a pivotal moment that helped to reshape workers’ rights in the U.S.

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