Utah

In the early 21st century, when the United States was divided into thirteen commonwealths, the old state of Utah became part of the Four States Commonwealth, along with Colorado, Arizona and New Mexico.

In 2062, many Mormon congregations came together to purchase places in Vault 70, a Vault-Tec Vault in Salt Lake City. Vault 70 opened in 2190 and its residents use their three G.E.C.K.s to found the city of New Jerusalem in the ruins of Salt Lake City.

Most of the cities in Utah were destroyed in the Great War in 2077 and most of the state's current inhabitants are tribals (including the powerful Hecate of Ouroborus and the Blackfoot tribe). Burham Springs, with its horrible mutants is also located in the former Utah.

New Jerusalem's intolerant prophet and apostles repeatedly voted to have no commerce with outsiders from other, failed communities, refugees, or tribals. In 2233, a number of angry tribals, raiders, and disassociated attackers gang up on New Jerusalem and sack it, killing most of the Mormons in the process.

The new living prophet, Judah Black, led most of the remnants of the Mormon community north to Ogden, Utah. They establish the town of New Canaan.