Colorado Mining Battles Sparked Civil War

In the early 1900s, Colorado descended into a literal domestic war. Miners fought for basic rights while the state government deployed the National Guard to crush them with martial law.

This brutal period saw miners pitted directly against wealthy owners and local authorities. The violence was so intense that the National Guard essentially operated as a private army to force workers back into the mines. It remains one of the most violent chapters in American labor history. These conflicts highlight how far companies and states went to maintain control over industrial profits.