In 1847, as Mormon settlers began arriving in what become known as Utah, it was realized that some sort of militia would be needed to protect the new settlements.

Members of the Mormon Battalion, after finally arriving in Utah after the end of the Mexican–American War, would also join the new Nauvoo Legion.

The Nauvoo Legion was necessarily involved in the would-be conflict between Mormons and Federal forces sent to Utah in the late 1850s.

After it was apparent no major hostilities would break out, a somewhat more conciliatory relationship developed between Federal troops and the Legion.

The Utah-based Nauvoo Legion participated in numerous efforts to quell problems with Indians, and also did certain protective duties in Utah during the Civil War.

[1] The Utah Army National Guard was previously led by adjutant general Michael Turley.