In 1914, a long-standing strike of mine workers against the Colorado Fuel & Iron Company was ended by the Colorado National Guard in what is known today as the Ludlow Massacre. As part of their preparations, the Guard emplaced a Colt 1895 “Potato Digger” machine gun on Water Tower Hill above the striking workers’ camp. These three photos from the Denver Public Library’s collection show that machine gun and its emplacement (the third appears to be taken from a different location).