Mormon Church The Church of Jesus Christ of Latter - day Saints , more commonly known as the Mormon church to most who are not members of the church , is the largest denomination originating from the founded by in Upstate New York in 1830 . Overview . Adherents , often referred to in - game as " New Canaanites " , view good works and adherence to the teachings of Jesus Christ as revealed through Joseph Smith , Jr . as the central tenets of their religion . The Church has an which includes five : the ( both and s ) , the , the , and the . Other than the Bible , the majority of the LDS canon consists of revelation dictated by Joseph Smith ( who was subsequently murdered by an angry mob ) and includes commentary and about the Bible , texts described as lost parts of the Bible , and other works believed to be written by ancient s . The Church of Jesus Christ of Latter - day Saints also follows a path of modern revelation , with each successive president of the church ( and his ) being sustained as ; and talks from are often likened to scripture , and are used as such in a supplementary fashion . Groups of Mormons still survive in the wasteland , mostly in the area that used to be known as the state of Utah , which originated as a safe haven for the Latter - day Saints as they to escape persecution . The Mormon Pioneers succeeded in establishing a community , which became Salt Lake City , Utah ' s capital and most populous city . Some time after a with the United States , the Utah territory , also known to the Mormons as " " , became the state of Utah in 1896 . This turn of events occurred after a series of unsuccessful petitions by the Church ' s former president , Brigham Young , who had also been Utah territory ' s first governor . The petitions had been denied in the past , primarily due to the Church ' s early stance on . After the proclamation of the ( which denounced any future plural marriages ) by Church president , Utah was granted statehood . Though truly brutal groups like Caesar ' s Legion will not hesitate to enslave or kill Mormons , most tribals and other organizations leave the Mormons alone , knowing that they often will voluntarily give medicine or other aid to groups who need it . Wastelanders tolerate the Mormons ' proselytizing because finding help with relatively benign conditions is rare ; the New Canaanites are also known as fair traders . Background . In 2062 , many Mormon congregations came together to purchase spots in Vault 70 , located in Salt Lake City , Utah . As part of the vault experiment , Vault 70 was assigned a clandestine social experiment ― specifically , for the jumpsuit extruders to fail within six months of the vault ' s sealing . The eventual total lack of clothing combined with Mormon religious sensibilities resulted in the single largest block of social data collected during the vault program . In 2190 , 113 years after the Great War , Vault 70 opened and its residents used the three G . E . C . K . ' s within to finally realize Joseph Smith ' s dream of a New Jerusalem , atop the ruins of Salt Lake City . Between 2220 and 2233 , New Jerusalem ' s prophet and apostles repeatedly voted to have no commerce with outsiders from other , failed communities , refugees , or tribals . Finally , in 2233 , many disgruntled and desperate refugees stormed New Jerusalem ' s gates and overwhelmed the militia , certain the Mormons were hoarding food and water while everyone outside the city walls suffered and died . Most of the Mormons were slaughtered and those that survived scattered into the desert . Two years after the fall of New Jerusalem , the new living prophet , Judah Black , led most of the survivors of the Mormon community north to . There , they established the town of New Canaan . A year later , they and a group of squatters fixed the Jericho water plant to run fresh water into the city . Judah Black died of old age in 2245 , and within two years , Jeremiah Rigdon emerged from a strange and powerful fever , claiming that an angel appeared to him in a vision , calling him to be the living prophet of God . In 2246 , the Mormon missionary Joshua Graham encountered two Followers of the Apocalypse : Bill Calhoun and Edward Sallow . The three eventually went on to become the founders of Caesar ' s Legion , bringing great shame to the Mormons . Following Graham ' s defeat at the First Battle of Hoover Dam , the church accepted him back into the flock , a decision that incurred the wrath of Sallow , now known as Caesar . In 2281 , New Canaan was burned to the ground by the White Legs , a group of tribal s who were tasked with the destruction of all of Graham ' s people as part of their petition to be absorbed into the Legion , killing Bishop Mordecai in the process . 30 of the survivors managed to find each other in the chaos , and traveled to Zion Canyon under the leadership of Daniel . There , they encountered 4 tribes : the Crazy Horns , the Dead Horses , the Sorrows and the Tar Walkers . By the time the Courier arrives in Zion , only the Dead Horses and the Sorrows remain ( the other two having fallen already to the White Legs ) . Daniel and Graham see it as their responsibility to ensure the survival of the native tribes by any means necessary . Appearances . The Mormons are mentioned in " " , and were due to appear in both Black Isle ' s canceled " Fallout 3 " and J . E . Sawyer ' s " Fallout " Role - Playing Game . Two Mormons appear in the " " , " Honest Hearts " .