Historically, the Latter Day Saint movement, which is often called Mormonism, has been the victim of religious violence beginning with reports by founder Joseph Smith immediately after his First Vision 1820 and continuing as the movement grew and migrated from its inception in western New York to Ohio, Missouri, and Illinois. The violence culminated when Smith was assassinated by a mob of 200 men in Carthage Jail in 1844. Joseph Smith had surrendered himself previously to the authorities, who failed to protect him. As a result of the violence they were faced with in the East, the Mormon pioneers, led by Brigham Young, migrated westwards and eventually founded Salt Lake City, and many other communities along the Mormon Corridor.