Utah Territorial Militia

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The Utah Territorial Militia, also known as the Nauvoo Legion, was the Mormon territory’s military force in Utah. It operated from about 1852 to 1887. Its roots go back to the Nauvoo Legion in Nauvoo, Illinois (1841–1845). In 1847, Brigham Young reformed the remnants of Nauvoo Legion into a territorial militia that was organized by Utah counties, similar to other frontier militias of the time.

Key conflicts and events
- Walker War (1853–1854): Fighting with Native Americans in Utah County, with casualties on both sides, including twenty Mormon militiamen.
- Utah War (1857–1858): Federal troops entered Utah, and the militia used tactics like destroying supply lines and avoiding direct confrontation. About 6,000 militiamen helped slow the advance of the federal army led by Albert Sidney Johnston and helped defend Salt Lake City as the army moved toward Camp Floyd. A peace agreement allowed the army to pass through Utah, and the federal government then appointed a territorial governor.
- Mountain Meadows Massacre (1857): A dark episode in which local militiamen from Iron County attacked emigrant wagon trains. Daniel H. Wells was the militia’s top commander at that time.
- Civil War era: Federal troops were often absent from Utah. Two units of the reorganized Nauvoo Legion helped protect western mail and telegraph lines against Indian attacks, but they saw little action. The militia’s major role effectively ended in 1862 after the Morrill Anti-Bigamy Act.
- Black Hawk War (1865–1872): The militia fought alongside U.S. forces against Ute bands led by Antonga Black Hawk, with more than 2,500 troops involved at times.

Decline and disbandment
In 1870, Governor J. Wilson Shaffer forced the militia to become inactive unless ordered otherwise, and federal actions after the Ghost Dance movement reinforced that stance. The Utah Territorial Militia never gathered again and was permanently disbanded in 1887 by the Edmunds-Tucker Act. In 1894, Utah formed the Utah National Guard as the official state militia in preparation for statehood.

Equipment and insignia
The militia used a small number of weapons, including a 1841 12-pound mountain howitzer issued in 1852. Some cannons and muskets survived and are housed in museums today—one Spanish 4-pounder is at the Mormon Battalion Visitor Center in San Diego, another at the Fort Douglas museum in Salt Lake City, and several other pieces remain in storage. Militia flags were often locally made, sometimes featuring religious symbols, and were usually patterned after the U.S. flag, sometimes with an eagle or a beehive emblem.