In September of 1857, one of the greatest atrocities in the history of Mormonism was carried out. Now known as the Mountain Meadows Massacre, a group of Latter-day Saints led a siege in Southern Utah against a wagon train of emigrants on their way from Arkansas to California. After the siege had dragged on for several days, and under the guise of a truce, leaders of the Mormon party lured the emigrants out of their protective circle of wagons and marched them a short distance across the valley before turning on them in surprise and slaughtering at least 120 unarmed men, women, and children.