The Baker–Fancher party was a group of American western emigrants from Marion, Crawford, Carroll, and Johnson counties in Arkansas, who departed Carroll County in April 1857 and "were attacked by the Mormons near the rim of the Great Basin, and about fifty miles from Cedar City, in Utah Territory, and that all of the emigrants, with the exception of 17 children, were then and there massacred and murdered" in the Mountain Meadows massacre. Sources estimate that between 120 and 140 men, women and children were killed on September 11, 1857, at Mountain Meadows, a rest stop on the Old Spanish Trail, in the Utah Territory. Some children of up to six years old were taken in by the Mormon families in Southern Utah, presumably because they had been judged to be too young to tell others about the massacre.

The Mountain Meadows Massacre was a series of attacks during the Utah War that resulted in the mass murder of at least 120 members of the Baker–Fancher emigrant wagon train. The massacre occurred in the southern Utah Territory at Mountain Meadows, and was perpetrated by settlers from the Church of Jesus Christ of Latter-day Saints involved with the Utah Territorial Militia who recruited and were aided by some Southern Paiute Native Americans. The wagon train, made up mostly of families from Arkansas, was bound for California, traveling on the Old Spanish Trail that passed through the Territory.