By early April 1914, Colorado Governor Elias Ammons thought the violence in his state's strike-bound southern coal district had eased enough that he could begin withdrawing the Colorado National Guard, deployed six months earlier as military occupiers. But Ammons misread the signals, and on April 20, 1914, a full-scale battle erupted between the remaining militiamen and armed strikers living in a tent colony at the small railroad town of Ludlow. Eight...