The 1857 Mountain Meadows Massacre

In September 1857, a wagon train of roughly one hundred and forty men, women, and children from Arkansas made camp in a remote valley in southwestern Utah Territory. They were headed to California. They never made it. Over the course of five days, members of the local Mormon militia and recruited Paiute warriors besieged the Fancher-Baker party at Mountain Meadows, and on September 11, under a white flag of truce, lured the emigrants into surrendering their weapons with a promise of safe escort.

What followed was one of the worst mass killings in American frontier history. The men were shot...