Following the American Civil War, officials of The Church of Jesus Christ of Latter-day Saints in Salt Lake City sought to establish missions in the remotest niches of the Intermountain West. In 1866, a quasi-military expedition of Mormons in pursuit of natives penetrated the high valleys to the west. In the 1870s, settlers moved into these valleys, eventually establishing Loa, Fremont, Lyman, Bicknell, and Torrey.