The Baker–Fancher party (also called the Fancher–Baker party, Fancher party, or Baker's Company) was the name used to collectively describe the American western emigrants from four northwestern counties in Arkansas, specifically Marion, Crawford, Carroll, and Johnson counties, who departed Carroll County in April 1857 and "were attacked by the Mormons and Santa Clara tribe of Indians 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 Baker-Fancher party consisted of several smaller parties that set out separately from the Ozarks in northwestern Arkansas, and then joined up along the way. Many of the families in the group were prosperous farmers and cattlemen with ample financial resources to make the journey west. Some of the groups had family and friends in California awaiting their arrival, as well as many relatives remaining in Arkansas. Among the groups were the Baker train, led by Captain John Twitty Baker from Carroll County, and the Fancher train, led by seasoned expeditioner Alexander Fancher, which left from Benton County. Other groups included the Huff train, which also left from Benton, the Mitchell, Dunlapp, and Prewitt trains which left from Marion County, and the Poteet–Tackitt–Jones, Cameron, and Miller trains which left from Johnson County. Pleasant Tackitt, from the Poteet–Tackitt–Jones train, was a Methodist minister who led the others in worship and prayer services while on their journey. When the groups left Arkansas in April 1857, the total company numbered more than 200. However, during the journey, some groups split off and others joined. Some of the trains that joined the company may have been from other states, such as Missouri.